fix(search): honor recall embedding timeout

[YOMXXX]

Summary

• pass embedding.recallTimeoutMs ?? embedding.timeoutMs from TdaiCore into both agent search tools
• forward the timeout to query embedding calls in tdai_memory_search and tdai_conversation_search
• add regression coverage for recall override and timeout fallback

Why

recallTimeoutMs is already documented as the user-facing recall-path embedding timeout and auto-recall honors it, but the agent-callable search tools still called embed(query) without per-call options. A slow embedding provider could therefore ignore the shorter recall timeout during interactive tool search.

Tests

• npm test -- src/core/tdai-core.test.ts
• npm test
• npm run build

[Maxwell-Code07]

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