style: apply black and isort formatting across entire codebase

- Standardize quote style (single to double quotes)
- Reorder and group imports alphabetically
- Fix line breaks and indentation for consistency
- Apply PEP 8 formatting standards

Also updated Makefile to exclude both venv and .venv from code quality checks.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

app/core/permissions.py

@@ -17,6 +17,7 @@ class VendorPermissions(str, Enum):
 
     Naming convention: RESOURCE_ACTION
     """
+
     # Dashboard
     DASHBOARD_VIEW = "dashboard.view"
 
@@ -166,17 +167,23 @@ class PermissionChecker:
         return required_permission in permissions
 
     @staticmethod
-    def has_any_permission(permissions: List[str], required_permissions: List[str]) -> bool:
+    def has_any_permission(
+        permissions: List[str], required_permissions: List[str]
+    ) -> bool:
         """Check if a permission list contains ANY of the required permissions."""
         return any(perm in permissions for perm in required_permissions)
 
     @staticmethod
-    def has_all_permissions(permissions: List[str], required_permissions: List[str]) -> bool:
+    def has_all_permissions(
+        permissions: List[str], required_permissions: List[str]
+    ) -> bool:
         """Check if a permission list contains ALL of the required permissions."""
         return all(perm in permissions for perm in required_permissions)
 
     @staticmethod
-    def get_missing_permissions(permissions: List[str], required_permissions: List[str]) -> List[str]:
+    def get_missing_permissions(
+        permissions: List[str], required_permissions: List[str]
+    ) -> List[str]:
         """Get list of missing permissions."""
         return [perm for perm in required_permissions if perm not in permissions]