chore(build): Kotlin 서비스 구조 및 Bazel 설정 정리

[kusuri12-09]

Summary

• 루트 Bazel alias를 admin, observability 중심으로 재정의하고 기존 admission, document, schedule, Go 서비스 alias를 제거했습니다.
• admin, observability 서비스를 Kotlin 멀티모듈 구조(adapter-in, adapter-out, application, domain, bootstrap)로 구성했습니다.
• Go 기반 서비스(analytics, evaluation, 기존 observability)와 Go Bazel 설정(go.MODULE.bazel, go.bzl, go.work*, proto Go target)을 제거했습니다.
• commitlint scope와 CodeRabbit 설정을 현재 서비스/빌드 구조에 맞게 정리했습니다.

Related Issue

• Closes system 서비스 구조 정리 #44

Scope

• Affected components:
  • Bazel root/module config: BUILD.bazel, MODULE.bazel, MODULE.bazel.lock
  • Proto build target: contracts/proto/BUILD.bazel
  • Commit/review config: .commitlintrc.cjs, .coderabbit.yaml
  • Admin service modules: systems/admin/**
  • Observability service modules: systems/observability/**
  • Removed services/config: systems/admission/**, systems/document/**, systems/schedule/**, systems/analytics/**, systems/evaluation/**, Go workspace/module files

Change Type

• Refactor
• Dependency update
• Config / infra change
• Tooling / CI

Risk

• 서비스 디렉터리와 Bazel target이 대규모로 변경되어 기존 admission, document, schedule, analytics, evaluation target을 참조하는 CI/CD, 문서, 스크립트가 실패할 수 있습니다.
• Go Bazel 설정과 proto Go target 제거로 Go 기반 빌드 또는 Go 클라이언트 생성 흐름이 더 이상 동작하지 않습니다.
• admin, observability bootstrap main class와 application name이 변경되어 실행/배포 설정에서 target 이름 동기화가 필요할 수 있습니다.

Checklist

• No functional changes
• CI / build verified

[coderabbitai]

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch chore/44-systems-service

• 🛠️ cleanup stale imports
• 🛠️ harden error messages
• 🛠️ test clarity pass

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