feat: Initial backend setup for Music Analyser

- Created FastAPI backend structure.
- Implemented Spotify Recently Played ingestion logic.
- Set up SQLite database with SQLAlchemy models.
- Added AI Service using Google Gemini.
- Created helper scripts for auth and background worker.
- Added Dockerfile and GitHub Actions workflow.

backend/run_worker.py

@@ -0,0 +1,22 @@
+import asyncio
+import sys
+import os
+from dotenv import load_dotenv
+
+load_dotenv()
+
+# Add the current directory to sys.path
+sys.path.append(os.path.dirname(os.path.abspath(__file__)))
+
+from app.database import Base, engine
+from app.ingest import run_worker
+
+# Ensure tables exist
+Base.metadata.create_all(bind=engine)
+
+if __name__ == "__main__":
+    print("Starting Background Worker...")
+    try:
+        asyncio.run(run_worker())
+    except KeyboardInterrupt:
+        print("Worker stopped.")