fix: update session logging directory path in README and code

- Changed the session logging directory from `~/.hermes-agent/logs/` to `~/.hermes/sessions/` for consistency.
- Updated the `run_agent.py` to reflect the new logging path, ensuring session logs are stored correctly alongside gateway sessions.

run_agent.py

@@ -1295,9 +1295,10 @@ class AIAgent:
             short_uuid = uuid.uuid4().hex[:6]
             self.session_id = f"{timestamp_str}_{short_uuid}"
         
-        # Setup logs directory
-        self.logs_dir = Path(__file__).parent / "logs"
-        self.logs_dir.mkdir(exist_ok=True)
+        # Session logs go into ~/.hermes/sessions/ alongside gateway sessions
+        hermes_home = Path(os.getenv("HERMES_HOME", Path.home() / ".hermes"))
+        self.logs_dir = hermes_home / "sessions"
+        self.logs_dir.mkdir(parents=True, exist_ok=True)
         self.session_log_file = self.logs_dir / f"session_{self.session_id}.json"
         
         # Track conversation messages for session logging