persistent auth in SQLite, API chat/logs, agent completion via channel

- Auth: move from state.json to SQLite authed_chats table, with memory cache
- Remove Persistent/state.json, all state now in noc.db
- HTTP API: POST /api/chat (end-to-end LLM), GET /api/logs (failed API requests)
- API logging: store raw request/response for 400 errors in api_log table
- Agent completion: spawn_agent sends LifeEvent::AgentDone via channel,
  life loop picks up with full conversation context and responds
- Config structs: derive Clone for HTTP server
- System prompt: instruct LLM not to add timestamps
- Makefile: rsync without --delete to preserve VPS-only tools

tools/manage_todo

@@ -19,7 +19,7 @@ import sys
 import requests
 
 APP_ID = "cli_a7f042e93d385013"
-APP_SECRET = "ht4FCjQ8JJ65ZPUWlff6ldFBmaP0mxqY"
+APP_SECRET = "6V3t5bFK4vRKsEG3VD6sQdAu2rmFEr2S"
 APP_TOKEN = "SSoGbmGFoazJkUs7bbfcaSG8n7f"
 TABLE_ID = "tblIA2biceDpvr35"
 BASE_URL = "https://open.feishu.cn/open-apis"