fix(core-ingestion): preserve effective container in chunks

[changhoon-sung]

Summary

• keep method chunks aligned with effectiveContainer instead of the weaker enclosing fallback
• add a Go parser regression test that asserts both the entity and chunk retain the receiver-owned container
• preserve the previously fixed method ownership behavior in the parser output

Test plan

• npm --prefix core-ingestion test -- --run src/__tests__/queries.go.test.ts
• broader parser test suite if desired

[Copilot]

Pull request overview

This PR fixes a Go parsing edge case where method chunks were assigned the weaker “enclosing” container instead of the receiver-owned effectiveContainer, ensuring chunk symbol keys stay aligned with method entity ownership.

Changes:

• Set pendingChunks[].container to effectiveContainer (receiver/interface-owned) rather than enclosing.
• Add a Go regression test asserting both the method entity and method chunk retain container: 'Service'.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
core-ingestion/src/index.ts	Aligns chunk container attribution with effectiveContainer to preserve method ownership in chunk output.
core-ingestion/src/__tests__/queries.go.test.ts	Adds regression assertions that both entities and chunks preserve the receiver-owned container for Go methods.

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