docs: update universal search response with start_frame/end_frame, limit param

docs_v1.0/API_WORKSPACE/modules/06_search.md

@@ -70,6 +70,7 @@ Multi-type BM25 full-text search across chunks, frames, and persons. Uses Postgr
 | `query` | string | Yes | — | Search text |
 | `file_uuid` | string | No | — | Restrict to specific file |
 | `types` | string[] | No | `["chunk","frame","person"]` | Search types |
+| `limit` | integer | No | 10 | Max results per type |
 | `page` | integer | No | 1 | Page number |
 | `page_size` | integer | No | 20 | Items per page |
 
@@ -89,11 +90,13 @@ curl -s -X POST "$API/api/v1/search/universal" \
   "results": [
     {
       "type": "chunk",
-      "chunk_id": "uuid_1429",
+      "chunk_id": "bd80fec92b0b6963d177a2c55bf713e2_2",
       "chunk_type": "story_child",
-      "start_time": 429.16,
-      "end_time": 430.5,
-      "text": "You could have the stamps.",
+      "start_frame": 5103,
+      "end_frame": 5127,
+      "start_time": 212.64,
+      "end_time": 213.64,
+      "text": "[213s-214s] Cary Grant: \"Olá!\"",
       "score": 0.9
     }
   ],