fix: watcher, incremental git, parse-worker, extractor gaps

[SutuSebastian]

Summary

Indexer and watcher fixes after #114:

Area	Category	Fix
Watcher watchActive after stop() during onPrime	concurrency	stopped guard + regression test
Incremental index misses rename source paths	data-loss	git diff --name-status --no-renames, parse D → deleted
Parse worker TOCTOU read/stat	concurrency	statSync in same per-file try/catch as read
Multi-declarator arrow/function scopes	bug	Defer scope push to ArrowFunctionExpression / FunctionExpression visit
Ref binding reads/writes	bug	VariableDeclarator + for..of/for..in pattern handling
Module new / ++ side effects	bug	NewExpression / UpdateExpression handlers
test.each curried calls	bug	Outer CallExpression callee + title from outer args
Bare / bracket process.env	bug	VariableDeclarator + computed literal branch
Unquoted CSS @import url(...)	bug	IMPORT_URL_UNQUOTED_RE

Also updates find-side-effect-files golden (cache.ts / store.ts top-level new Map()).

Test plan

• bun test (watcher, get-changed-files, parse-worker-core, behavioral, css-parser)
• bun run test:golden (find-side-effect-files updated)
• bun run typecheck
• lint-staged on commits
• CI green on latest push

[changeset-bot]

🦋 Changeset detected

Latest commit: 1b5ab66

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@stainless-code/codemap	Patch

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Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: e1001ee0-fbaa-48dc-8ca3-69684fd293ba

📥 Commits

Reviewing files that changed from the base of the PR and between ae54ce0 and 1b5ab66.

📒 Files selected for processing (19)

• .changeset/fix-watcher-index-extractors.md
• fixtures/golden/minimal/find-side-effect-files.json
• src/application/get-changed-files.test.ts
• src/application/index-engine.ts
• src/application/watcher.test.ts
• src/application/watcher.ts
• src/css-parser.test.ts
• src/css-parser.ts
• src/extractors/behavioral.test.ts
• src/extractors/module-side-effects.ts
• src/extractors/references.ts
• src/extractors/runtime-markers.ts
• src/extractors/scopes.ts
• src/extractors/symbols.ts
• src/extractors/tests.ts
• src/extractors/types.ts
• src/parse-worker-core.test.ts
• src/parse-worker-core.ts
• src/parser.ts

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/watcher-index-extractors

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