perf(search): seek the name index for exact-name lookups - #1542

Analyzed 3 changed files (8 symbols). Blast radius: 156 files, 503 symbols.

111 affected test files to run:

• __tests__/adaptive-explore-sizing.test.ts
• __tests__/android-res-exclusion.test.ts
• __tests__/arkts-resolution.test.ts
• __tests__/batched-ref-cleanup.test.ts
• __tests__/c-fnptr-kernel-sweep.test.ts
• __tests__/c-fnptr-synthesizer.test.ts
• __tests__/celery-dispatch-synthesizer.test.ts
• __tests__/cfml-inheritance-resolution.test.ts
• __tests__/cfml-receiver-inference.test.ts
• __tests__/cli-affected-paths.test.ts
• __tests__/cli-no-color.test.ts
• __tests__/cli-node-command.test.ts
• __tests__/cli-query-command.test.ts
• __tests__/closure-collection-synthesizer.test.ts
• __tests__/concurrent-locking.test.ts
• __tests__/config-secret-redaction.test.ts
• __tests__/context-ranking.test.ts
• __tests__/context.test.ts
• __tests__/cooperative-yield.test.ts
• __tests__/daemon-socket-fallback.test.ts

Report: http://localhost:5173/impact/a342c712-7323-47c8-891d-5f42c5a9c754