Initial FastAPI Setup for Government Meeting Tracker API

[kaizengrowth]

This PR implements the initial FastAPI structure for the Government Meeting Tracker application.

I also added a provisional SPEC.md draft with what I understand to be the requirements of this project (pending confirmation with Carlos, John, and Luke)

Changes:

• Set up the FastAPI application structure with proper routing
• Created API endpoints for meetings, users, topics, and transcriptions
• Defined Pydantic data models for all entities
• Added placeholder service implementations
• Configured async SQLite database connection for development
• Updated Poetry dependencies to include FastAPI, SQLAlchemy, and other required packages

To Test:

You can validate that these endpoints work by installing the updated packages with Poetry, and running FastAPI:

PYTHONPATH=. poetry run uvicorn src.main:app --reload --port 8001

Swagger docs for new endpoints:

Once the server is running, you can navigate to: http://127.0.0.1:8001/docs
Then click on the GET /api/meetings endpoint and click "Try it out" followed by "Execute"

Next Steps:

• Connect @jdungan's code on branch (not yet merged) for WhisperX integration to API endpoints
• Implement actual database models with SQLAlchemy
• Complete service implementations with database operations
• Add Celery task runners for periodically scraping from Tgov site
• Add user subscription page (frontend UI design needed)
• Add authentication and authorization for user
• Develop the push notification system with Twilio

This PR establishes the foundation for the API layer of our application.