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Addresses intermittent query failures on the live instance (container itself is healthy — failures are application/query-level) plus security hardening. Reliability (analytics_mcp.py): - Discard dead pooled connections instead of recycling them. A broken socket (DB restart, network blip, crash) previously poisoned the pool and every later query handed that connection failed until container recreation. New _is_disconnect() classifies real connection loss (class-08 / 57P0x SQLSTATE, or socket-level OperationalError with pgcode=None) vs. an in-session query error like statement_timeout (QueryCanceled / 57014), which is NOT a disconnect and leaves the connection usable. - query() retries ONCE, only on a genuine disconnect, so a recycled-but-stale connection is invisible to the analyst (a real query error still surfaces). - Bound concurrent checkouts with a semaphore (POOL_MAX) so >POOL_MAX concurrent queries QUEUE instead of overflowing the pool and raising PoolError (a 500 to the analyst). - Lazy pool (minconn=0) + retry on init, so a brief DB outage at deploy time no longer crash-loops the worker. Build reproducibility: - Commit uv.lock (was gitignored) and build with `uv sync --frozen` so redeploys can't silently pull a newer, behaviour-changed mcp/starlette. Security: - Constant-time Bearer-token comparison (hmac.compare_digest). - /healthz no longer leaks the analyst/token count. - Dockerfile runs as a non-root user. - deploy.sh: Docker log rotation (bound disk) + Traefik rate-limit middleware. Also: relax the SQL guard so a forbidden keyword inside a string literal (e.g. WHERE summary ILIKE '%please delete%') no longer rejects a valid read; the blocklist still rejects data-modifying CTEs (and writes are impossible anyway via the analytics_ro GRANTs + read-only rolled-back txn). Fix stale docstrings. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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15 lines
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# NOTE: uv.lock is intentionally NOT ignored — the Dockerfile copies it for
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# reproducible `uv sync --frozen` builds.
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.git
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.venv
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__pycache__
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*.pyc
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.env
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*.env
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.analytics_ro.pw
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docs
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scripts
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deploy.sh
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.ruff_cache
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.mypy_cache
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README.md
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