feat: agent platform initial commit

- FastAPI + HTMX UI: dashboard, agents CRUD, chat, audit, tools
- SQLite schema: agents, conversations, messages, audit, sessions
- Code-agent sync (agents/*.py -> DB on startup)
- MCP client with health check
- Token auth (Bearer + session)
- LiteLLM integration via llm.py
- Docker Compose: agent-platform + mcp-tools services
- Smoke tests pass: /health 200, /api/agents 200, / 401

.env.example

@@ -0,0 +1,17 @@
+# LLM Configuration
+LLM_PROVIDER=openrouter
+LLM_API_KEY=sk-or-v1-xxx
+LLM_MODEL=anthropic/claude-3.5-sonnet
+LLM_API_BASE=
+
+# Auth (CHANGE THIS!)
+AUTH_TOKEN=change-me-to-something-secure
+
+# Logging
+LOG_LEVEL=info
+
+# Limits
+MAX_HISTORY_MESSAGES=10
+MAX_PARALLEL_AGENTS=5
+AGENT_IDLE_TIMEOUT_SEC=300
+MCP_TIMEOUT=10