Add detailed debug output tracking connection lifecycle, autoping events,
and session state transitions with timestamps and counters.
- Track connection attempts, successes, disconnects, and reconnects
- Log autoping timer events, responses, and timeouts
- Record session login, logout, and reconnection attempts
- Add elapsed time calculations since key events
- Use [CONNDBG] tag for easy log filtering
Files: connection.c, iq.c, session.c, connection.h
