Move api.settings to common.settings (#11036)

### What problem does this PR solve?

As title

### Type of change

- [x] Refactoring

---------

Signed-off-by: Jin Hai <haijin.chn@gmail.com>

graphrag/light/smoke.py

@@ -16,7 +16,6 @@
 
 import argparse
 import json
-from api import settings
 import networkx as nx
 import logging
 import trio
@@ -28,7 +27,7 @@ from api.db.services.llm_service import LLMBundle
 from api.db.services.user_service import TenantService
 from graphrag.general.index import update_graph
 from graphrag.light.graph_extractor import GraphExtractor
-from common import globals
+from common import settings
 
 settings.init_settings()
 
@@ -64,7 +63,7 @@ async def main():
 
     chunks = [
         d["content_with_weight"]
-        for d in globals.retriever.chunk_list(
+        for d in settings.retriever.chunk_list(
             args.doc_id,
             args.tenant_id,
             [kb_id],