v1.36.187

feat(state): add read-only runtime compatibility diagnosis and observed-layout write guards; keep legacy storage without migration or activation

fix(runtime): recheck CLI/MCP/REPL, direct I/O, retained descriptors, lock heartbeat, Windows replacement and Git mutation boundaries; preserve standalone concurrent producers

perf(state): reuse operation-local Git topology and workspace ownership while re-reading compatibility indicators; add real writer and old-client negative controls