Fix customer timestamps and add customer list endpoint

app/models.py

@@ -22,8 +22,8 @@ class Customer(Base):
     api_key = Column(String(64), unique=True, nullable=False)
     webhook_url = Column(String(255), nullable=True, default=None)  # URL where call results will be sent
     is_active = Column(Boolean, default=True)
-    created_at = Column(DateTime(timezone=True), server_default=func.now())
-    updated_at = Column(DateTime(timezone=True), onupdate=func.now())
+    created_at = Column(DateTime(timezone=True), default=datetime.utcnow)
+    updated_at = Column(DateTime(timezone=True), default=datetime.utcnow, onupdate=datetime.utcnow)
 
     def __repr__(self):
         return f"<Customer {self.name}>"

main.py

@@ -310,6 +310,21 @@ async def health_check():
     """Health check endpoint"""
     return {"status": "healthy"}
 
+@app.get("/api/v1/customers", response_model=List[Customer])
+async def list_customers(
+    db: Session = Depends(get_db),
+    current_admin: str = Depends(get_current_admin)
+):
+    """List all customers"""
+    try:
+        customers = db.query(CustomerModel).all()
+        return customers
+    except Exception as e:
+        raise HTTPException(
+            status_code=500,
+            detail=f"Failed to list customers: {str(e)}"
+        )
+
 if __name__ == "__main__":
     import uvicorn
     host = os.getenv("HOST", "0.0.0.0")