feat(llm): modify the summary info and enhance the request logic

[MrJs133]

1. Modify the return messages of Get Vector Index Info . Display the number of elements in "chunk vector" and "graph vid vector" separately.
   { "embed_dim": 1024, "vector_info": { "chunk_vector_num": 8, "graph_vid_vector_num": 483, "graph_properties_vector_num": 8 } }

2. Modify the return messages of Get Graph Index Info . Display the number of vertices and edges. Display the first 100 edges.
   { "num_vertices": [ 483 ], "num_edges": [ 692 ], "vertices": [ "12:James", "12:Sarah" ....], "edges": [ "S9:徐起>12>12>>S10:冀RM78Y7!小型轿车!徐起", "S9:刘雪峰>11>11>>S11:未与前车保持足以采取紧急制动措施的安全距离", ....], "vid_index": { "embed_dim": 1024, "num_vectors": 483, "num_vids": 483 } }

3. When a user simultaneously employs text and files, a log.error pops up.

4. add doc_input_text into config_prompt.py to impl text in Doc(s) persistence

[imbajin]

TODO: separate the timer out of app.py