Implement user authentication and management system with FastAPI

- Added authentication routes for login, registration, password reset, and account deletion in `auth.py`.
- Implemented user profile management, including updating user information and changing passwords.
- Created dashboard views to display user-specific information and recent activity in `dashboard.py`.
- Developed leaderboard views to show team rankings and points in `leaderboard.py`.
- Added QR code generation and redemption functionality in `qr.py` and `redeem.py`.
- Implemented team management features, allowing users to create and join teams in `teams.py`.
- Introduced session debugging utility to assist with session-related issues in `debug_session.py`.
- Configured Docker Compose for MySQL database and FastAPI application with environment variables.
- Updated requirements.txt to include necessary dependencies for the application.

app/views/qr.py

@@ -0,0 +1,41 @@
+#!/usr/bin/env python3
+"""
+Generate QR codes for top teams (quiz master).
+"""
+import qrcode
+import io
+from fastapi import APIRouter, Depends
+from fastapi.responses import StreamingResponse
+from sqlalchemy.orm import Session
+from ..db import SessionLocal
+from ..models import QRTicket
+import uuid
+
+router = APIRouter()
+
+def get_db():
+    db = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()
+
+@router.get("/generate/{points}")
+def generate_qr(points: int, db: Session = Depends(get_db)):
+    """
+    Generate a QR code for awarding `points` points. 
+    Saves a record in the DB, returns the PNG as streaming response.
+    """
+    code_str = str(uuid.uuid4())
+
+    ticket = QRTicket(code=code_str, points=points)
+    db.add(ticket)
+    db.commit()
+    db.refresh(ticket)
+
+    qr_img = qrcode.make(code_str)
+    buf = io.BytesIO()
+    qr_img.save(buf, format="PNG")
+    buf.seek(0)
+
+    return StreamingResponse(buf, media_type="image/png")