Introduced beartype (#3460)

### What problem does this PR solve?

Introduced [beartype](https://github.com/beartype/beartype) for runtime
type-checking.

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

graphrag/index.py

@@ -18,7 +18,6 @@ import os
 from concurrent.futures import ThreadPoolExecutor
 import json
 from functools import reduce
-from typing import List
 import networkx as nx
 from api.db import LLMType
 from api.db.services.llm_service import LLMBundle
@@ -53,7 +52,7 @@ def graph_merge(g1, g2):
     return g
 
 
-def build_knowledge_graph_chunks(tenant_id: str, chunks: List[str], callback, entity_types=DEFAULT_ENTITY_TYPES):
+def build_knowledge_graph_chunks(tenant_id: str, chunks: list[str], callback, entity_types=DEFAULT_ENTITY_TYPES):
     _, tenant = TenantService.get_by_id(tenant_id)
     llm_bdl = LLMBundle(tenant_id, LLMType.CHAT, tenant.llm_id)
     ext = GraphExtractor(llm_bdl)