Agent gateway + observer — autonomous internal operation

Three new systemd services:
- lakehouse-agent (:3700) — REST gateway wrapping all lakehouse tools.
  Clean JSON in/out, no protocol complexity. 9 endpoints: /search,
  /sql, /match, /worker/:id, /ask, /log, /playbooks, /profile/:id, /vram
- lakehouse-observer — watches operations, logs to lakehouse, asks
  local model to diagnose failure patterns, consolidates successful
  patterns into playbooks every 5 cycles
- Stdio MCP transport preserved for Claude Code integration

AGENT_INSTRUCTIONS.md: complete operating manual for sub-agents.
Rules: never hallucinate, SQL first for structured questions, hybrid
for matching, log every success, check playbooks before complex tasks.

Observer loop:
  observed() wrapper timestamps + persists every gateway call →
  error analyzer reads failures + asks LLM for diagnosis →
  playbook consolidator groups successes by endpoint pattern

All three designed for zero human intervention — agents operate,
observer watches, playbooks accumulate, iteration happens internally.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

mcp-server/.gitignore

@@ -0,0 +1,34 @@
+# dependencies (bun install)
+node_modules
+
+# output
+out
+dist
+*.tgz
+
+# code coverage
+coverage
+*.lcov
+
+# logs
+logs
+_.log
+report.[0-9]_.[0-9]_.[0-9]_.[0-9]_.json
+
+# dotenv environment variable files
+.env
+.env.development.local
+.env.test.local
+.env.production.local
+.env.local
+
+# caches
+.eslintcache
+.cache
+*.tsbuildinfo
+
+# IntelliJ based IDEs
+.idea
+
+# Finder (MacOS) folder config
+.DS_Store