Refactor: axum based API migration

[tsurai]

Replaces the old HTTP API with one based on axum for better maintainability. While this does require rather major refactoring within openvasd the changes are kept minimal to keep the PR scope reviewable. This leads to some awkward code that will be refactored in follow up PRs.

Behavioral changes

• Routes that accept a JSON encoded payload MUST set Content-Type: application/json.
• HEAD routes are now RFC compliant, meaning they do the same as their GET counterpart but with the result body removed.
• Routes with a trailing / are considered a separate route now, resulting in 404s.
• The enable-get-scans option under [endpoints] was previously ignored, defaulting to true. It's working properly now and defaults to false as documented.

Jira: SC-1610

[github-actions]

Dependency Review

✅ No vulnerabilities or license issues or OpenSSF Scorecard issues found.

Snapshot Warnings

⚠️: No snapshots were found for the head SHA 7ec89c4.

Ensure that dependencies are being submitted on PR branches and consider enabling retry-on-snapshot-warnings. See the documentation for more information and troubleshooting advice.

OpenSSF Scorecard

Package	Version	Score	Details
cargo/arc-swap	1.9.2	🟢 3	Details Check Score Reason Dangerous-Workflow 🟢 10 no dangerous workflow patterns detected Packaging ⚠️ -1 packaging workflow not detected Code-Review ⚠️ 2 Found 5/18 approved changesets -- score normalized to 2 Maintained ⚠️ 0 0 commit(s) and 1 issue activity found in the last 90 days -- score normalized to 0 Binary-Artifacts 🟢 10 no binaries found in the repo Token-Permissions ⚠️ 0 detected GitHub workflow tokens with excessive permissions Pinned-Dependencies ⚠️ 0 dependency not pinned by hash detected -- score normalized to 0 CII-Best-Practices ⚠️ 0 no effort to earn an OpenSSF best practices badge detected Security-Policy ⚠️ 0 security policy file not detected Fuzzing ⚠️ 0 project is not fuzzed License 🟢 10 license file detected Signed-Releases ⚠️ -1 no releases found Branch-Protection ⚠️ 0 branch protection not enabled on development/release branches SAST ⚠️ 0 SAST tool is not run on all commits -- score normalized to 0
cargo/axum	0.8.9	🟢 5.5	Details Check Score Reason Maintained 🟢 10 30 commit(s) and 13 issue activity found in the last 90 days -- score normalized to 10 Code-Review 🟢 10 all changesets reviewed Dangerous-Workflow 🟢 10 no dangerous workflow patterns detected Packaging ⚠️ -1 packaging workflow not detected Token-Permissions ⚠️ 0 detected GitHub workflow tokens with excessive permissions Binary-Artifacts 🟢 10 no binaries found in the repo Pinned-Dependencies ⚠️ 1 dependency not pinned by hash detected -- score normalized to 1 CII-Best-Practices ⚠️ 0 no effort to earn an OpenSSF best practices badge detected Security-Policy ⚠️ 0 security policy file not detected Fuzzing ⚠️ 0 project is not fuzzed License 🟢 10 license file detected Signed-Releases ⚠️ -1 no releases found Branch-Protection ⚠️ -1 internal error: error during branchesHandler.setup: internal error: some github tokens can't read classic branch protection rules: https://github.com/ossf/scorecard-action/blob/main/docs/authentication/fine-grained-auth-token.md SAST ⚠️ 0 SAST tool is not run on all commits -- score normalized to 0
cargo/axum-core	0.5.6	🟢 5.5	Details Check Score Reason Maintained 🟢 10 30 commit(s) and 13 issue activity found in the last 90 days -- score normalized to 10 Code-Review 🟢 10 all changesets reviewed Dangerous-Workflow 🟢 10 no dangerous workflow patterns detected Packaging ⚠️ -1 packaging workflow not detected Token-Permissions ⚠️ 0 detected GitHub workflow tokens with excessive permissions Binary-Artifacts 🟢 10 no binaries found in the repo Pinned-Dependencies ⚠️ 1 dependency not pinned by hash detected -- score normalized to 1 CII-Best-Practices ⚠️ 0 no effort to earn an OpenSSF best practices badge detected Security-Policy ⚠️ 0 security policy file not detected Fuzzing ⚠️ 0 project is not fuzzed License 🟢 10 license file detected Signed-Releases ⚠️ -1 no releases found Branch-Protection ⚠️ -1 internal error: error during branchesHandler.setup: internal error: some github tokens can't read classic branch protection rules: https://github.com/ossf/scorecard-action/blob/main/docs/authentication/fine-grained-auth-token.md SAST ⚠️ 0 SAST tool is not run on all commits -- score normalized to 0
cargo/axum-macros	0.5.1	🟢 5.5	Details Check Score Reason Maintained 🟢 10 30 commit(s) and 13 issue activity found in the last 90 days -- score normalized to 10 Code-Review 🟢 10 all changesets reviewed Dangerous-Workflow 🟢 10 no dangerous workflow patterns detected Packaging ⚠️ -1 packaging workflow not detected Token-Permissions ⚠️ 0 detected GitHub workflow tokens with excessive permissions Binary-Artifacts 🟢 10 no binaries found in the repo Pinned-Dependencies ⚠️ 1 dependency not pinned by hash detected -- score normalized to 1 CII-Best-Practices ⚠️ 0 no effort to earn an OpenSSF best practices badge detected Security-Policy ⚠️ 0 security policy file not detected Fuzzing ⚠️ 0 project is not fuzzed License 🟢 10 license file detected Signed-Releases ⚠️ -1 no releases found Branch-Protection ⚠️ -1 internal error: error during branchesHandler.setup: internal error: some github tokens can't read classic branch protection rules: https://github.com/ossf/scorecard-action/blob/main/docs/authentication/fine-grained-auth-token.md SAST ⚠️ 0 SAST tool is not run on all commits -- score normalized to 0
cargo/axum-server	0.8.0	🟢 3.2	Details Check Score Reason Code-Review 🟢 4 Found 6/15 approved changesets -- score normalized to 4 Dangerous-Workflow 🟢 10 no dangerous workflow patterns detected Binary-Artifacts 🟢 10 no binaries found in the repo Maintained ⚠️ 0 0 commit(s) and 0 issue activity found in the last 90 days -- score normalized to 0 Token-Permissions ⚠️ 0 detected GitHub workflow tokens with excessive permissions Packaging ⚠️ -1 packaging workflow not detected Pinned-Dependencies ⚠️ 0 dependency not pinned by hash detected -- score normalized to 0 CII-Best-Practices ⚠️ 0 no effort to earn an OpenSSF best practices badge detected Security-Policy ⚠️ 0 security policy file not detected License 🟢 10 license file detected Fuzzing ⚠️ 0 project is not fuzzed Branch-Protection ⚠️ 0 branch protection not enabled on development/release branches Signed-Releases ⚠️ -1 no releases found SAST ⚠️ 0 SAST tool is not run on all commits -- score normalized to 0
cargo/fs-err	3.3.1	🟢 3.9	Details Check Score Reason Packaging ⚠️ -1 packaging workflow not detected Dangerous-Workflow 🟢 10 no dangerous workflow patterns detected Code-Review 🟢 4 Found 13/30 approved changesets -- score normalized to 4 Maintained 🟢 3 4 commit(s) and 0 issue activity found in the last 90 days -- score normalized to 3 Token-Permissions ⚠️ 0 detected GitHub workflow tokens with excessive permissions Binary-Artifacts 🟢 10 no binaries found in the repo Pinned-Dependencies ⚠️ 0 dependency not pinned by hash detected -- score normalized to 0 CII-Best-Practices ⚠️ 0 no effort to earn an OpenSSF best practices badge detected Security-Policy ⚠️ 0 security policy file not detected Fuzzing ⚠️ 0 project is not fuzzed License 🟢 10 license file detected Signed-Releases ⚠️ -1 no releases found Branch-Protection ⚠️ -1 internal error: error during branchesHandler.setup: internal error: some github tokens can't read classic branch protection rules: https://github.com/ossf/scorecard-action/blob/main/docs/authentication/fine-grained-auth-token.md SAST ⚠️ 0 SAST tool is not run on all commits -- score normalized to 0
cargo/matchit	0.8.4	🟢 4.9	Details Check Score Reason Code-Review 🟢 4 Found 13/29 approved changesets -- score normalized to 4 Binary-Artifacts 🟢 10 no binaries found in the repo Maintained ⚠️ 0 0 commit(s) and 0 issue activity found in the last 90 days -- score normalized to 0 Packaging ⚠️ -1 packaging workflow not detected Dangerous-Workflow 🟢 10 no dangerous workflow patterns detected Token-Permissions 🟢 10 GitHub workflow tokens follow principle of least privilege Pinned-Dependencies ⚠️ 0 dependency not pinned by hash detected -- score normalized to 0 CII-Best-Practices ⚠️ 0 no effort to earn an OpenSSF best practices badge detected Fuzzing 🟢 10 project is fuzzed Security-Policy ⚠️ 0 security policy file not detected License 🟢 10 license file detected Signed-Releases ⚠️ -1 no releases found Branch-Protection ⚠️ 0 branch protection not enabled on development/release branches SAST ⚠️ 0 SAST tool is not run on all commits -- score normalized to 0
cargo/serde_path_to_error	0.1.20	🟢 4	Details Check Score Reason Maintained ⚠️ 0 0 commit(s) and 0 issue activity found in the last 90 days -- score normalized to 0 Packaging ⚠️ -1 packaging workflow not detected Dangerous-Workflow 🟢 10 no dangerous workflow patterns detected Code-Review ⚠️ 0 Found 0/26 approved changesets -- score normalized to 0 Binary-Artifacts 🟢 10 no binaries found in the repo Token-Permissions 🟢 10 GitHub workflow tokens follow principle of least privilege Pinned-Dependencies ⚠️ 0 dependency not pinned by hash detected -- score normalized to 0 CII-Best-Practices ⚠️ 0 no effort to earn an OpenSSF best practices badge detected Fuzzing ⚠️ 0 project is not fuzzed License 🟢 10 license file detected Signed-Releases ⚠️ -1 no releases found Branch-Protection ⚠️ 0 branch protection not enabled on development/release branches Security-Policy 🟢 3 security policy file detected SAST ⚠️ 0 SAST tool is not run on all commits -- score normalized to 0
cargo/tower	>= 0.5.3, < 0.6.0	Unknown	Unknown
cargo/tower-service	>= 0.3.3, < 0.4.0	Unknown	Unknown

Scanned Files

• rust/Cargo.lock
• rust/Cargo.toml

[tehforsch]

Looks great! Thank you!

I have some initial comments just from looking at the code. I'll also look at the larger structure a little bit now, but if anything comes up I'll do it in a second review

Dismissed review because it was just a blocker review.