feat: add created_at timestamp to ScaleResult model and response handling

- Introduced created_at field in the ScaleResult model to track response creation time.
- Updated result handling logic in app.py to populate created_at with the current UTC time when saving responses.

app.py

@@ -11,6 +11,7 @@ from xml.etree import ElementTree as ET
 from sqlalchemy.orm import Session
 from database import get_db, ScaleResult
 import geoip2.database
+from datetime import datetime, UTC
 
 app = FastAPI()
 templates = Jinja2Templates(directory="templates")
@@ -133,7 +134,8 @@ async def result(request: Request, scale_id: str, db: Session = Depends(get_db))
                 location=location,
                 raw_response=dict(form_data),
                 sum_response=responses,
-                avg_response=average
+                avg_response=average,
+                created_at=datetime.now(UTC)
             )
             db.add(db_response)
             db.commit()

database.py

@@ -1,7 +1,6 @@
 from sqlalchemy import create_engine, Column, Integer, String, Float, DateTime, ForeignKey, JSON
 from sqlalchemy.ext.declarative import declarative_base
 from sqlalchemy.orm import sessionmaker, relationship
-from datetime import datetime, UTC
 import json
 
 SQLALCHEMY_DATABASE_URL = "sqlite:///./public/psychoscales.db"
@@ -25,7 +24,7 @@ class ScaleResult(Base):
     raw_response = Column(JSON)
     sum_response = Column(JSON)
     avg_response = Column(JSON)
-    created_at = Column(DateTime, default=datetime.now(UTC))
+    created_at = Column(DateTime)
 
 # Create tables
 Base.metadata.create_all(bind=engine)