diag(awg): log clientsTable record count and External merge per read

Intermittent 'External instead of names' on NATA: response shows 13
named + 68 External peers. All read paths are all-or-error, so this
logs container, path (prefetch batch vs direct) and record count to
identify the wrong/partial read next time it happens.

managers/awg_manager.py

@@ -2087,6 +2087,14 @@ x_exit_sync() {
         try:
             data = json.loads(out)
             if isinstance(data, list):
+                # Diagnostics for the intermittent 'External instead of names'
+                # glitch: log which container the table came from, via which
+                # path, and how many records it held. When a response shows
+                # N named + M External, this line tells whether the read
+                # itself returned a wrong/partial table.
+                logger.info(
+                    f"clientsTable {container_name}: {len(data)} records, "
+                    f"{len(out)} bytes (via {'prefetch batch' if batch is not None else 'direct read'})")
                 return data
             elif isinstance(data, dict):
                 # Migration from old format
@@ -2098,6 +2106,9 @@ x_exit_sync() {
                             'clientName': info.get('clientName', 'Unknown'),
                         }
                     })
+                logger.info(
+                    f"clientsTable {container_name}: {len(result)} records "
+                    f"(legacy dict format, via {'prefetch batch' if batch is not None else 'direct read'})")
                 return result
         except json.JSONDecodeError:
             if batch is not None:
@@ -2557,6 +2568,7 @@ done < "$BW"
                 client['userData'] = user_data
 
         # Pick up peers from conf that are NOT in clientsTable (created via native Amnezia app)
+        conf_peers = {}
         try:
             conf_peers = self._parse_peers_from_config(protocol_type)
             for pub_key, peer_info in conf_peers.items():
@@ -2589,6 +2601,11 @@ done < "$BW"
                 })
         except Exception as e:
             logger.warning(f'get_clients: failed to parse conf peers: {e}')
+        external_added = sum(1 for c in clients_table if c.get('userData', {}).get('externalClient'))
+        logger.info(
+            f"get_clients({protocol_type}): table={len(known_ids)}, "
+            f"conf peers total={len(conf_peers)}, "
+            f"conf-only External appended={external_added}")
 
         # Connection flood monitoring: attach the latest snapshot written by
         # the background collector (collect_conn_stats). Only if the snapshot