fix(mcp): return structured compact results #751

Job	Run time
changes	4s
security / codeql-gate	38m 20s
security / security-static	29s
lint / lint	5m 16s
security / license-gate	2m 55s
pr-smoke (windows-latest)	5m 54s
pr-smoke (ubuntu-latest)	3m 52s
pr-smoke (macos-14)	4m 10s
test / test-tsan	14m 37s
test / setup-matrix	2s
test / test-windows-guards	7m 40s
test / test-windows (windows-latest, CLANG64, x86_64)	35m 41s
test / test-unix (macos-14, cc, c++)	10m 54s
test / test-unix (ubuntu-24.04-arm, gcc, g++)	1h 17m 57s
test / test-unix (macos-15-intel, cc, c++)	21m 57s
test / test-unix (ubuntu-latest, gcc, g++)	15m 36s
ci-ok	3s
	4h 5m 27s

Provide feedback