feat(mcp): forward file_pattern in semantic_search to scope results #3892

Job	Run time
TypeScript type check	6m 5s
Verify dynamic imports	7s
Native host build (ubuntu-latest)	2m 39s
Native host build (windows-latest)	6m 7s
Rust compile check	1m 5s
Security audit	6m 20s
Native host build (macos-latest)	3m 44s
Lint	7m 21s
Pre-publish benchmark gate	10m 24s
Test Node 22 (windows-latest)	15m 41s
Test Node 22 (ubuntu-latest)	8m 35s
Engine parity (ubuntu-latest)	6m 40s
Engine parity (windows-latest)	12m 38s
Test Node 22 (macos-latest)	11m 56s
Engine parity (macos-latest)	14m 12s
CI Testing Pipeline	4s
	1h 53m 38s

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