feat: Sync from 0.2 updates

[jake-arkinstall]

• Adds zero-length array support to argreader
• Adds envreader
• Allows per-process environment variable setting in multiprocessing environments

[Copilot]

Pull request overview

This PR syncs updates from the 0.2 line by expanding the bundled utilities (adding an EnvReader utility alongside ArgReader), improving ArgReader behavior for zero-length arrays, and enabling per-process environment variable overrides for multiprocessing runs in selene-sim.

Changes:

• Add EnvReader utility (Rust cdylib + Python plugin) with tests and example LLVM IR.
• Add support paths for zero-length arrays in ArgReader (including trace post-processing) plus new tests/snapshots.
• Add per-process environment variable remapping for SeleneProcess instances spawned by run_shots.

Reviewed changes

Copilot reviewed 25 out of 26 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
selene-sim/python/selene_sim/process.py	Adds process_list_index and remaps prefixed env vars for per-process configuration.
selene-sim/python/selene_sim/instance.py	Passes process index into SeleneProcess when spawning multiple processes.
selene-sim/python/selene_sim/backends/bundled_utilities.py	Exposes bundled utility plugins via combined __all__.
selene-ext/utilities/envreader/rust/lib.rs	Implements EnvReader Rust utility functions and logging.
selene-ext/utilities/envreader/python/tests/test_envreader.py	Adds Python tests for EnvReader and per-process env behavior.
selene-ext/utilities/envreader/python/tests/resources/envreader_example.ll	Adds LLVM IR fixture calling EnvReader functions.
selene-ext/utilities/envreader/python/selene_envreader_plugin/plugin.py	Adds Python Utility plugin wrapper for EnvReader library loading/linking.
selene-ext/utilities/envreader/python/selene_envreader_plugin/init.py	Exports EnvReaderPlugin.
selene-ext/utilities/envreader/Cargo.toml	Adds Cargo package definition for EnvReader utility.
selene-ext/utilities/envreader/Cargo.lock	Adds lockfile for EnvReader utility dependencies.
selene-ext/utilities/envreader/build.rs	Adds build script to link against the Base QIS interface runtime and set rpath.
selene-ext/utilities/argreader/rust/lib.rs	Adds handling allowing bool-array-typed inputs to satisfy numeric array getters (enabling empty arrays).
selene-ext/utilities/argreader/python/tests/test_argreader.py	Updates imports, adds trace-pass snapshotting, and adds zero-length array test.
selene-ext/utilities/argreader/python/tests/snapshots/test_argreader/test_arg_reader_zero_length_arrays/interface1/trace.json	Adds snapshot for zero-length array trace output (interface1).
selene-ext/utilities/argreader/python/tests/snapshots/test_argreader/test_arg_reader_zero_length_arrays/interface1/pass.json	Adds snapshot for zero-length array post-processed trace (interface1).
selene-ext/utilities/argreader/python/tests/snapshots/test_argreader/test_arg_reader_zero_length_arrays/interface0/trace.json	Adds snapshot for zero-length array trace output (interface0).
selene-ext/utilities/argreader/python/tests/snapshots/test_argreader/test_arg_reader_zero_length_arrays/interface0/pass.json	Adds snapshot for zero-length array post-processed trace (interface0).
selene-ext/utilities/argreader/python/tests/snapshots/test_argreader/test_arg_reader_trace/interface1/pass.json	Adds snapshot for trace-pass output (interface1).
selene-ext/utilities/argreader/python/tests/snapshots/test_argreader/test_arg_reader_trace/interface0/pass.json	Adds snapshot for trace-pass output (interface0).
selene-ext/utilities/argreader/python/tests/resources/argreader_zero_length_arrays.ll	Adds LLVM IR fixture calling ArgReader array getters with len=0.
selene-ext/utilities/argreader/python/tests/resources/argreader_example.ll	Adds an extra external declaration to the example fixture.
selene-ext/utilities/argreader/python/selene_argreader_plugin/trace_pass.py	Adds a trace pass to convert ArgReader opaque YAML payloads into structured key/value events.
selene-ext/utilities/argreader/python/selene_argreader_plugin/provider.py	Allows empty lists in provided runtime arguments (enables zero-length arrays).
selene-ext/utilities/argreader/python/selene_argreader_plugin/init.py	Exports argreader_trace_pass from the package.
pyproject.toml	Bumps selene-core requirement and includes the EnvReader Python package; adjusts uv cache keys.
.github/workflows/build_wheels.yml	Removes id-token: write permission from the workflow.

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[jake-arkinstall]

@copilot Fix the code for this review comment.

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[Copilot]

Fixed in the latest commit. The updated logic now collects the promoted variables for the current process index first, then filters out all SELENE_PROCESS_* variables from the environment, and finally applies the promoted variables — ensuring no other process's scoped variables remain visible.