feat(postprocess): resolve cross-file ClassName.method edge targets

[gzenz]

Summary

Postprocess pass that resolves ClassName.method edges whose target class lives in another file.

Stacked PR approach

This is PR 5/16 in a stack that ports closed #158 into small, reviewable slices based on your feedback. Each branch contains this commit plus every earlier branch in the stack, so it applies cleanly on its own. The intended merge order is bottom-to-top.

Stack (merge order):

1. feat/store-connection-cache-v2
2. feat/hardened-tests-v2
3. feat/parser-python-star-imports-v2
4. feat/parser-resolve-class-method-v2
5. feat/parser-cross-file-class-method-v2
6. feat/parser-cross-file-class-method-fuzzy-v2
7. feat/parser-node-decorators-v2
8. feat/parser-import-map-bare-call-resolver-v2
9. feat/query-dedupe-and-transitive-tests-v2
10. feat/incremental-ignore-build-artifacts-v2
11. perf/build-timing-telemetry-v2
12. feat/parser-call-noise-filter-v2
13. feat/parser-typed-var-enrichment-v2
14. feat/parser-func-ref-enrichment-v2
15. feat/cli-quiet-json-and-enrich-v2
16. feat/cli-refactor-dead-code-v2

After you merge PR N, I rebase PRs N+1..16 on current main and force-push. Each PR ends up as a single commit on top of the previous one. Review only the newest commit in this PR; the rest will already be on main (or in earlier PRs in the stack).

All 16 branches are rebased on 072ab80. None re-attempts the closed lang-handler refactor.

Roadmap: restoring v7 loop-test parity

Measured impact on loop-test fixtures (Gadgetbridge Kotlin/Java, HealthAgent Python/TS):

• HealthAgent CALLS resolution: 15.2 percent to 36.1 percent (v7 baseline 39.3 percent)
• HealthAgent dead-code: 275 to 122 (backend/api 106 to 0, backend/cli 57 to 2)
• Gadgetbridge CALLS resolution: 33.4 percent, Q2/Q3/Q5 scorecard queries now return qualified targets
• Gadgetbridge loop-test scorecard: 8 PASS / 2 PARTIAL

Still deferred after this stack

• Lang handler refactor (closed feat: lang handler refactor + parser improvements #246): will redo per-language, one PR per handler, each with tests, once v7 parity holds. Addresses the no-handler-tests concern directly. Svelte, TESTED_BY, Zig, PowerShell, and Julia support will be preserved.
• test_pain_points.py fixtures: half are handler-dependent, so the full suite waits for the per-handler PRs.

[tirth8205]

Current main already resolves cross-file bare calls using unique-name or import evidence. The remaining head 34929c8 pass needs redesign against GraphStore.resolve_bare_call_targets: it rewrites from a globally unique class name without import/type evidence, never verifies the method node exists, loses nested-class qualification, and full-scans classes/edges without tests or a benchmark. Please require same-file/import/type evidence, preserve ambiguity, and add false-positive plus large-graph regressions.

[tirth8205]

Final maintainer disposition: the safe intent is now merged through replacement PR #649 at bfe1a13.

Adopted:

• static Class.method resolution when same-file, repository-local import, or receiver-type evidence identifies the class;
• target-node existence checks;
• qualified targets that preserve nested class and lexical scope.

Not adopted:

• global unique-class guessing without import/type evidence;
• full class/edge scans for each unresolved call;
• rewriting ambiguous calls instead of preserving them.

The replacement passed 37 focused typed-call plus Julia overlap tests, 565 broader parser/language tests, and all 11 GitHub checks including Windows. Gideon Zenz is retained as co-author on the merged commit. Closing this branch as superseded by the corrected implementation.