feat: add chat group daily summarizer

- Telegram collector (Telethon MTProto) with checkpoint-based message fetching
- Claude API summarization via proxy (haiku model)
- Dashboard page with date picker, markdown summary, raw message drill-down
- Separate container lifecycle from dashboard for stable Telethon sessions
- Shared SQLite DB mounted read-only into dashboard

chat-summarizer/main.py

@@ -0,0 +1,41 @@
+import asyncio
+import logging
+import os
+from datetime import datetime, timedelta, timezone
+
+from db import init_db
+from collector import collect_messages
+from summarizer import summarize
+
+logging.basicConfig(level=logging.INFO, format="%(asctime)s %(name)s %(levelname)s %(message)s")
+log = logging.getLogger(__name__)
+
+CST = timezone(timedelta(hours=8))
+SUMMARY_HOUR = int(os.environ.get("SUMMARY_HOUR", 23))
+COLLECT_INTERVAL = 300  # 5 minutes
+
+async def main():
+    await init_db()
+    log.info("Chat summarizer started (summary hour=%d CST)", SUMMARY_HOUR)
+
+    last_summary_date = None
+
+    while True:
+        try:
+            await collect_messages()
+        except Exception as e:
+            log.error("Collection error: %s", e)
+
+        now = datetime.now(CST)
+        today = now.strftime("%Y-%m-%d")
+        if now.hour >= SUMMARY_HOUR and last_summary_date != today:
+            try:
+                await summarize(today)
+                last_summary_date = today
+            except Exception as e:
+                log.error("Summary error: %s", e)
+
+        await asyncio.sleep(COLLECT_INTERVAL)
+
+if __name__ == "__main__":
+    asyncio.run(main())