Refactor investor and company management API with FastAPI integration

- Updated README.md to reflect new features and architecture.
- Implemented company management routes in app/api/companies.py.
- Enhanced main FastAPI application in app/main.py to include company routes and query processing.
- Improved querying capabilities in app/services/querying.py with natural language processing for investor searches.
- Updated requirements.txt to include necessary dependencies for FastAPI and related libraries.
- Added comprehensive error handling and response formatting for API endpoints.

requirements.txt

@@ -1,16 +1,139 @@
-# Core dependencies
-pandas>=2.0.0
-sqlalchemy>=2.0.0
-pydantic>=2.0.0
-
-# Vector database
-chromadb>=0.4.0
-
-# LLM integration
-openai>=1.0.0
-
-# Environment management
-python-dotenv>=1.0.0
-
-# Additional dependencies for data processing
-typing-extensions>=4.0.0
+aiohappyeyeballs==2.6.1
+aiohttp==3.12.15
+aiosignal==1.4.0
+annotated-types==0.7.0
+anyio==4.10.0
+attrs==25.3.0
+backoff==2.2.1
+bcrypt==4.3.0
+build==1.3.0
+cachetools==5.5.2
+certifi==2025.8.3
+charset-normalizer==3.4.3
+chromadb==1.0.20
+click==8.2.1
+coloredlogs==15.0.1
+dataclasses-json==0.6.7
+distro==1.9.0
+dnspython==2.7.0
+durationpy==0.10
+email-validator==2.3.0
+fastapi==0.116.1
+fastapi-cli==0.0.8
+fastapi-cloud-cli==0.1.5
+filelock==3.19.1
+flatbuffers==25.2.10
+frozenlist==1.7.0
+fsspec==2025.7.0
+google-auth==2.40.3
+googleapis-common-protos==1.70.0
+greenlet==3.2.4
+grpcio==1.74.0
+h11==0.16.0
+hf-xet==1.1.8
+httpcore==1.0.9
+httptools==0.6.4
+httpx==0.28.1
+httpx-sse==0.4.1
+huggingface-hub==0.34.4
+humanfriendly==10.0
+idna==3.10
+importlib-metadata==8.7.0
+importlib-resources==6.5.2
+itsdangerous==2.2.0
+jinja2==3.1.6
+jiter==0.10.0
+jsonpatch==1.33
+jsonpointer==3.0.0
+jsonschema==4.25.1
+jsonschema-specifications==2025.4.1
+kubernetes==33.1.0
+langchain==0.3.27
+langchain-community==0.3.29
+langchain-core==0.3.75
+langchain-openai==0.3.32
+langchain-text-splitters==0.3.10
+langgraph==0.6.6
+langgraph-checkpoint==2.1.1
+langgraph-prebuilt==0.6.4
+langgraph-sdk==0.2.4
+langsmith==0.4.20
+markdown-it-py==4.0.0
+markupsafe==3.0.2
+marshmallow==3.26.1
+mdurl==0.1.2
+mmh3==5.2.0
+mpmath==1.3.0
+multidict==6.6.4
+mypy-extensions==1.1.0
+numpy==2.3.2
+oauthlib==3.3.1
+onnxruntime==1.22.1
+openai==1.102.0
+opentelemetry-api==1.36.0
+opentelemetry-exporter-otlp-proto-common==1.36.0
+opentelemetry-exporter-otlp-proto-grpc==1.36.0
+opentelemetry-proto==1.36.0
+opentelemetry-sdk==1.36.0
+opentelemetry-semantic-conventions==0.57b0
+orjson==3.11.3
+ormsgpack==1.10.0
+overrides==7.7.0
+packaging==25.0
+pandas==2.3.2
+pip==25.2
+posthog==5.4.0
+propcache==0.3.2
+protobuf==6.32.0
+pyasn1==0.6.1
+pyasn1-modules==0.4.2
+pybase64==1.4.2
+pydantic==2.11.7
+pydantic-core==2.33.2
+pydantic-extra-types==2.10.5
+pydantic-settings==2.10.1
+pygments==2.19.2
+pypika==0.48.9
+pyproject-hooks==1.2.0
+python-dateutil==2.9.0.post0
+python-dotenv==1.1.1
+python-multipart==0.0.20
+pytz==2025.2
+pyyaml==6.0.2
+referencing==0.36.2
+regex==2025.7.34
+requests==2.32.5
+requests-oauthlib==2.0.0
+requests-toolbelt==1.0.0
+rich==14.1.0
+rich-toolkit==0.15.0
+rignore==0.6.4
+rpds-py==0.27.1
+rsa==4.9.1
+sentry-sdk==2.35.1
+shellingham==1.5.4
+six==1.17.0
+sniffio==1.3.1
+sqlalchemy==2.0.43
+starlette==0.47.3
+sympy==1.14.0
+tenacity==9.1.2
+tiktoken==0.11.0
+tokenizers==0.21.4
+tqdm==4.67.1
+typer==0.16.1
+typing-extensions==4.15.0
+typing-inspect==0.9.0
+typing-inspection==0.4.1
+tzdata==2025.2
+ujson==5.11.0
+urllib3==2.5.0
+uvicorn==0.35.0
+uvloop==0.21.0
+watchfiles==1.1.0
+websocket-client==1.8.0
+websockets==15.0.1
+xxhash==3.5.0
+yarl==1.20.1
+zipp==3.23.0
+zstandard==0.24.0