fix(graph): preserve Python qualified names without false edges

[DivyamTalwar]

Summary

Fixes #421.

Reducing requests.Session to Session can link a class to itself or to an unrelated local class. Separately, treating the leaf of unaliased import pkg.util as a bound name can invent a util.helper() call relationship.

Keep plain dotted base names qualified and unresolved instead of guessing a local match. Do not create a leaf namespace binding for an unaliased dotted import; retain module import edges and supported explicit aliases. Native extractor-to-snapshot tests cover both false-edge cases and valid local/aliased controls.

Version Bump

No release requested. Package versions, dependencies, lockfiles and release workflows are unchanged.

Test plan

The repository-native focused tests report 8 failures and 18 passing controls on unchanged production source; the prepared correction passes all 26 focused tests. The final commit is independently validated by the full Node 22/Linux suite with coverage, typecheck, build, duplication guard and critical-only bundle audit. The workflow enforces zero failed and zero skipped tests.

Exact submitted commit: 056df2b02716f8ff9adcbbb816a865a0f5d43b3e. Independent Linux job, commands and logs. The checkout is pinned to this commit, not a combined patch branch.

The focused tests use isolated files or source fixtures and the real parser/cache/usage code. No customer data, credentials or live model/backend calls are required.

Compatibility and limits

Qualified-base resolution and general Python evaluation are not implemented. Dynamic base expressions remain unresolved, and unaliased dotted imports do not gain new inferred top-package bindings. PR #270 touches pushNode for node deduplication; this fix changes qualification handling rather than duplicating that work.

A clean full macOS suite and native Windows validation are not claimed. Upstream CI approval and maintainer review are separate from this passing independent gate.

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📥 Commits

Reviewing files that changed from the base of the PR and between ce30de7 and 056df2b.

📒 Files selected for processing (2)

• src/graph/extract/python.ts
• tests/shared/graph/python.test.ts

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