feat(backend): Update models and endpoints configuration

- Enhanced ticket and comment models with proper relationships
- Updated client_profile model for better data handling
- Improved auth endpoint with better error handling
- Updated main app configuration and imports
- Added new dependencies to requirements.txt
- Enhanced tickets endpoint with attachment support

backend/app/api/v1/endpoints/auth.py

@@ -8,6 +8,7 @@ from fastapi import APIRouter, HTTPException, status, Depends
 from fastapi.security import OAuth2PasswordBearer, OAuth2PasswordRequestForm
 from sqlalchemy.ext.asyncio import AsyncSession
 from sqlalchemy import select
+from sqlalchemy.orm import selectinload
 from pydantic import BaseModel, EmailStr
 from typing import Optional
 import structlog
@@ -257,41 +258,49 @@ async def get_current_user(
             detail="Invalid token"
         )
     
-    # TODO: Fetch actual user from database
+    user_id = payload.get("sub")
+    if not user_id:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Invalid token payload"
+        )
+    
+    # Fetch actual user from database
+    query = select(User).where(User.id == user_id).options(
+        selectinload(User.tenant)
+    )
+    result = await db.execute(query)
+    user = result.scalar_one_or_none()
+    
+    if not user:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="User not found"
+        )
+        
+    if not user.is_active:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="User account is disabled"
+        )
     
     return {
-        "id": payload["sub"],
-        "email": payload["email"],
-        "role": payload["role"],
-        "tenant_id": payload["tenant_id"]
+        "id": str(user.id),
+        "email": user.email,
+        "first_name": user.first_name,
+        "last_name": user.last_name,
+        "role": user.role.value if hasattr(user.role, 'value') else user.role,
+        "tenant_id": str(user.tenant_id),
+        "tenant_name": user.tenant.name if user.tenant else None,
+        "is_active": user.is_active,
+        "is_two_factor_enabled": user.totp_secret is not None,
+        "last_login": user.last_login.isoformat() if user.last_login else None,
+        "created_at": user.created_at.isoformat()
     }
 
 
 # ===================================
 # DEPENDENCIES
 # ===================================
-
-async def get_current_active_user(token: str = Depends(oauth2_scheme)):
-    """
-    Dependency to get current active user from token.
-    
-    Args:
-        token: Access token
-        
-    Returns:
-        Current user data
-        
-    Raises:
-        HTTPException: If token is invalid or user is inactive
-    """
-    payload = security.verify_token(token)
-    if not payload:
-        raise HTTPException(
-            status_code=status.HTTP_401_UNAUTHORIZED,
-            detail="Invalid token",
-            headers={"WWW-Authenticate": "Bearer"},
-        )
-    
-    # TODO: Verify user exists and is active
-    
-    return payload
+# Dependencies are imported from app.api.deps to avoid duplication
+# Use get_current_user and get_current_active_superuser from deps.py