feat(session): session lifecycle management and audit export - #132
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Add SessionManager (create/close/get) with signed TRACE Claim generation
on session close, staleness detection for attestation reports, and a signed
audit bundle export endpoint. Extend MCPServer with optional session_manager
and audit_chain kwargs to serve GET /sessions/{id}/trace-claim and
GET /audit/export with chain integrity verification before export.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Summary
SessionManagerinsrc/cmcp_gateway/session/manager.pyimplementingcreate_session,close_session,get_trace_claim, andget_audit_bundleclose_sessionappends asession_endaudit entry, builds and signs aGatewayClaimviagenerate_trace_claim, detects attestation staleness, and stores the claim keyed by session IDget_audit_bundleverifies chain integrity withverify_chain()before export and signssha256(canonical_json(entries))with the TEE signing keyMCPServer.__init__with optionalsession_managerandaudit_chainkwargs; addsGET /sessions/{session_id}/trace-claim(404 on miss) andGET /audit/export?session_id=<id>(500 on broken chain, 501 if not wired up)tests/unit/test_session_manager.pycovering all acceptance criteriaTest plan
python -m ruff check src/ tests/— cleanpython -m bandit -r src/ -c pyproject.toml— no issuespython -m mypy src/cmcp_gateway/— 30 files, no errorspython -m pytest tests/— 197 passed, 0 failedCloses #60, Closes #55
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