machine-bridge-mcp v1.2.11

Bounded output continuation and repository backlog gate

• Stop large one-shot process responses from overwhelming MCP hosts. run_process, run_local_command, and exec_command now inline only a bounded stdout/stderr preview, retain up to 1 MiB per stream in a temporary completed process session, and return an output_session_id for paged read_process continuation. Nonzero exits keep their human error message bounded while preserving structured continuation details.
• Avoid protocol-level payload duplication by replacing the text mirror of large object results with a compact field summary while retaining the authoritative object in structuredContent. The fast/platform/full check runner suppresses successful child noise, preserves bounded head/tail diagnostics on failure, and supports explicit MBM_CHECK_VERBOSE=1 streaming. Coverage cleanup now retries concurrent late V8 coverage-file writes instead of failing after the thresholds already passed.
• Resolve the release-acceptance file race by opening no-follow descriptors first, checking descriptor/path identity, and reading acceptance records and tarballs through bounded descriptors. Remove the temporary CodeQL exception and add deterministic path-replacement and symbolic-link regressions.
• Add a guarded GitHub backlog pre-push check. npm run github:push now blocks unrelated open pull requests and open issues not covered by a standard closing keyword in the current branch commits; the current branch PR remains updateable. Add unit and integration coverage for output paging, compact MCP projection, bounded check diagnostics, and backlog enforcement.