fix: create missing devices during peer sync

- bulk_update_devices now creates devices if they don't exist locally
  but have useful metadata (floor, label, or favorite status)
- Sync trigger endpoint now reports both pulled and pushed device counts
- Enables full bidirectional sync of device metadata between peers

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/rf_mapper/database.py

@@ -1025,9 +1025,24 @@ class DeviceDatabase:
                     if cursor.rowcount > 0:
                         updated_count += 1
             else:
-                # Device doesn't exist locally - we can only sync metadata for
-                # devices we've seen, so skip unknown devices
-                pass
+                # Device doesn't exist locally - create it if it has useful metadata
+                if dev.get("assigned_floor") is not None or dev.get("custom_label") or dev.get("is_favorite"):
+                    device_type = dev.get("device_type", "bluetooth")
+                    name = dev.get("name") or dev.get("ssid") or device_id
+                    now = datetime.now().isoformat()
+
+                    cursor.execute("""
+                        INSERT INTO devices (device_id, device_type, name, ssid, manufacturer,
+                                           custom_label, assigned_floor, is_favorite, notes,
+                                           first_seen, last_seen, total_observations, updated_at)
+                        VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, 0, ?)
+                    """, (
+                        device_id, device_type, name, dev.get("ssid"), dev.get("manufacturer"),
+                        dev.get("custom_label"), dev.get("assigned_floor"),
+                        1 if dev.get("is_favorite") else 0, dev.get("notes"),
+                        now, now, dev.get("updated_at", now)
+                    ))
+                    updated_count += 1
 
         conn.commit()
         return updated_count