init: telegram bot bridging messages to claude sessions

Async Rust bot (teloxide + tokio) that:
- Authenticates users per chat with a passphrase (resets daily at 5am)
- Generates deterministic UUID v5 session IDs from chat_id + date
- Pipes messages to `claude -p --session-id/--resume <uuid>`
- Persists auth and session state to disk across restarts
- Deploys as systemd --user service via `make deploy`

config.example.yaml

@@ -0,0 +1,8 @@
+tg:
+  key: "YOUR_TELEGRAM_BOT_TOKEN"
+
+auth:
+  passphrase: "YOUR_AUTH_PASSPHRASE"
+
+session:
+  refresh_hour: 5