Refactor requirements and code formatting

- Simplified requirements.txt by removing specific version constraints
- Added comment about extra library installation using pipmaster
- Improved code formatting in base.py, operate.py, and postgres_impl.py
- Cleaned up SQL templates and query method signatures with consistent formatting

requirements.txt

@@ -1,53 +1,3 @@
-aioboto3==14.1.0
-aiofiles==24.1.0
-aiohttp==3.11.13
-ascii_colors==0.5.2
-asyncpg==0.30.0
-chromadb==0.6.3
-community==1.0.0b1
-docx==0.2.4
-# faiss
-fastapi==0.115.11
-glm==0.4.4
-graspologic==3.4.1
-gunicorn==23.0.0
-httpx==0.28.1
-imgui_bundle==1.6.2
-jsonlines==4.0.0
-llama_index==0.12.22
-moderngl==5.12.0
-motor==3.7.0
-nano_vectordb==0.0.4.3
-neo4j==5.28.1
-nest_asyncio==1.6.0
-networkx==3.4.2
-numpy
-openpyxl==3.1.5
-oracledb==3.0.0
-Pillow==11.1.0
-pipmaster==0.4.0
-protobuf
-psutil==7.0.0
-psycopg==3.2.5
-psycopg_pool==3.2.6
-pydantic==2.10.6
-pymilvus==2.5.4
-pymongo==4.11.2
-PyPDF2==3.0.1
-python-dotenv==1.0.1
-pyvis==0.3.2
-qdrant_client==1.13.3
-redis==5.2.1
-Requests==2.32.3
-sentence_transformers==3.4.1
-setuptools==75.8.0
-SQLAlchemy==2.0.38
-starlette==0.46.0
-tenacity==9.0.0
-tiktoken==0.9.0
-torch==2.6.0
-transformers==4.49.0
-uvicorn==0.34.0
 aiohttp
 configparser
 future
@@ -63,3 +13,5 @@ tenacity
 
 # LLM packages
 tiktoken
+
+# Extra libraries are installed when needed using pipmaster