test(search): add soft-delete filtering tests (#29)

[MunemHashmi]

Closes #29

Summary

• Add test verifying soft-deleted skills are excluded from vector search hydration (hydrateResults)
• Add test verifying soft-deleted exact slug matches are excluded from lexical fallback (lexicalFallbackSkills)

Test plan

• All 12 search tests pass
• Lint clean

[vercel]

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[greptile-apps]

Greptile Summary

Adds comprehensive test coverage for soft-delete filtering in search functionality. The two new test cases verify that soft-deleted skills are correctly excluded from both vector search hydration and lexical fallback exact slug matches, aligning with the existing implementation in convex/search.ts:229 and convex/search.ts:269.

The tests follow established patterns in the file, use appropriate mocks, and have clear assertions. All 12 tests reportedly pass, and the changes are purely additive (no modifications to existing tests or implementation code).

Confidence Score: 5/5

• This PR is safe to merge with minimal risk
• Score reflects that this is a test-only change with no modifications to production code. The new tests correctly verify existing soft-delete filtering behavior, follow established testing patterns, and add valuable coverage for an important edge case. The PR author confirmed all tests pass and lint is clean.
• No files require special attention

_{Last reviewed commit: 2b50e96}