Feature/feat1017 (#2872)

### What problem does this PR solve?

1. fix: mid map show error in knowledge graph, juse because
```@antv/g6```version changed
2. feat: concurrent threads configuration support in graph extractor
3. fix: used tokens update failed for tenant
4. feat: timeout configuration support for llm
5. fix: regex error in graph extractor
6. feat: qwen rerank(```gte-rerank```) support
7. fix: timeout deal in knowledge graph index process. Now chat by
stream output, also, it is configuratable.
8. feat: ```qwen-long``` model configuration

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)
- [x] New Feature (non-breaking change which adds functionality)

---------

Co-authored-by: chongchuanbing <chongchuanbing@gmail.com>
Co-authored-by: Kevin Hu <kevinhu.sh@gmail.com>

graphrag/mind_map_extractor.py

@@ -16,6 +16,7 @@
 
 import collections
 import logging
+import os
 import re
 import logging
 import traceback
@@ -89,7 +90,8 @@ class MindMapExtractor:
             prompt_variables = {}
 
         try:
-            exe = ThreadPoolExecutor(max_workers=12)
+            max_workers = int(os.environ.get('MINDMAP_EXTRACTOR_MAX_WORKERS', 12))
+            exe = ThreadPoolExecutor(max_workers=max_workers)
             threads = []
             token_count = max(self._llm.max_length * 0.8, self._llm.max_length-512)
             texts = []