fix(gateway): read /status token totals from SessionDB (#17158)

/status was reading session_entry.total_tokens from the in-memory
SessionStore (gateway/session.py), which the agent never writes to —
so the token count was always 0.

The agent already persists token deltas to the SQLite SessionDB
(run_agent.py:11497) for every platform with a session_id. Route
/status through that single source of truth instead of duplicating
token writes into a second store.

Fix:
- gateway/run.py: _handle_status_command now calls
  self._session_db.get_session(session_id) and sums the five token
  component columns (input/output/cache_read/cache_write/reasoning).
  Falls back to 0 when no SessionDB is configured or no row exists.
- Two new regression tests covering the populated-row and
  missing-row paths.

Co-authored-by: Hermes <127238744+teknium1@users.noreply.github.com>

gateway/run.py

@@ -6568,11 +6568,30 @@ class GatewayRunner:
         queue_depth = self._queue_depth(session_key, adapter=adapter)
 
         title = None
+        # Pull token totals from the SQLite session DB rather than the
+        # in-memory SessionStore.  The agent's per-turn token deltas are
+        # persisted into sessions_db (run_agent.py), not into SessionEntry,
+        # so session_entry.total_tokens is always 0.  SessionDB is the
+        # single source of truth; reading it here keeps /status accurate
+        # without duplicating token writes into two stores.
+        db_total_tokens = 0
         if self._session_db:
             try:
                 title = self._session_db.get_session_title(session_entry.session_id)
             except Exception:
                 title = None
+            try:
+                row = self._session_db.get_session(session_entry.session_id)
+                if row:
+                    db_total_tokens = (
+                        (row.get("input_tokens") or 0)
+                        + (row.get("output_tokens") or 0)
+                        + (row.get("cache_read_tokens") or 0)
+                        + (row.get("cache_write_tokens") or 0)
+                        + (row.get("reasoning_tokens") or 0)
+                    )
+            except Exception:
+                db_total_tokens = 0
 
         lines = [
             "📊 **Hermes Gateway Status**",
@@ -6584,7 +6603,7 @@ class GatewayRunner:
         lines.extend([
             f"**Created:** {session_entry.created_at.strftime('%Y-%m-%d %H:%M')}",
             f"**Last Activity:** {session_entry.updated_at.strftime('%Y-%m-%d %H:%M')}",
-            f"**Tokens:** {session_entry.total_tokens:,}",
+            f"**Tokens:** {db_total_tokens:,}",
             f"**Agent Running:** {'Yes ⚡' if is_running else 'No'}",
         ])
         if queue_depth: