Plumbs the ScopeExtractor (#919) into the real parsing pipeline.
`ParsedFile` artifacts now flow from workers to the parsing-processor
without changing any legacy-DAG behavior.
## Shipped
### `gitnexus/src/core/ingestion/scope-extractor-bridge.ts` (new)
- `extractParsedFile(provider, sourceText, filePath, onWarn?)`
- Short-circuits (returns `undefined`) when the provider has not
implemented `emitScopeCaptures`. True for every language today —
this is the default no-op path.
- Invokes the hook + `ScopeExtractor.extract`, returns a `ParsedFile`.
- **Swallows exceptions on both sides.** Failures route through the
optional `onWarn` callback (or `console.warn`) and return
`undefined`. Scope-extraction errors NEVER break legacy parsing on
the same file.
- Standalone module (not nested in `parse-worker.ts`) so tests can
import it directly without triggering the worker's top-level
`parentPort!.on(...)`.
### `gitnexus/src/core/ingestion/workers/parse-worker.ts`
- `ParseWorkerResult.parsedFiles: ParsedFile[]` added.
- `processFileGroup` calls `extractParsedFile` AFTER tree parse,
BEFORE legacy extraction. Worker provides an `onWarn` callback that
routes bridge warnings through `parentPort.postMessage({ type:
'warning', message })`.
- `mergeResult` includes `parsedFiles` in the sub-batch merge.
- Initial + reset accumulator templates include `parsedFiles: []`.
### `gitnexus/src/core/ingestion/parsing-processor.ts`
- `WorkerExtractedData.parsedFiles: ParsedFile[]` added.
- Empty-result branch and the across-chunk aggregation both include
`parsedFiles`. Aggregation is tolerant of workers that don't emit
the field (older builds / partial rollouts).
### Ring 1 tweak: `emitScopeCaptures` sync return
`readonly CaptureMatch[]` (was `Promise<readonly CaptureMatch[]>`).
Tree-sitter and COBOL's regex tagger are both synchronous; no
foreseeable need for async work inside this hook. Sync lets the
already-sync worker pipeline invoke it inline without cascading
`async` up through the batch driver + IPC handler.
## Tests (9 new; full suite 311/311)
`gitnexus/test/unit/scope-resolution/parse-worker-scope-integration.test.ts`:
- Not-migrated (2): undefined-returning hook · never-invokes-extractor
- Migrated (3): happy path · argument threading · honors
`shouldCreateScope` override
- Error resilience (4): hook throws · extractor throws (no Module) ·
extractor throws (sibling overlap) · `onWarn` gets routed
message with filePath + error body
## Verification
- `tsc --noEmit` clean in both packages
- `gitnexus-shared` build clean
- 311/311 combined scope-resolution / shadow / model / flag suite
- 9/9 new bridge tests
## What's NOT in this PR (still deferred to #921)
- Actually using the `parsedFiles` — that's the finalize orchestrator.
- `ModuleScopeIndex.byFilePath` materialization — belongs alongside
the rest of the SemanticModel indexes in #921.
## Closes part of #909. Unblocks
- #921 finalize-orchestrator — consumes `WorkerExtractedData.parsedFiles`
