fix(fsm): Fix StateLog.by capture and cycle validation; add photographer field to photos

## FSM State Machine Fixes

### StateLog.by Field Capture
- Modified TransitionMethodFactory to pass 'user' as 'by' kwarg to enable
  django-fsm-log's @fsm_log_by decorator to correctly capture the user who
  performed the transition
- Applied fix to both escalate_transition and create_transition_method
- Uses exec() to dynamically create transition functions with correct __name__
  before decorators are applied, ensuring django-fsm's method registration works

### Cycle Validation Behavior
- Changed validate_no_cycles() to return ValidationWarning instead of ValidationError
- Cycles are now treated as warnings, not blocking errors, since cycles are often
  intentional in operational status FSMs (e.g., reopening after temporary closure)

### Ride Status Transitions
- Added TEMPORARY_CLOSURE -> OPERATING transition (reopen after temporary closure)
- Added SBNO -> OPERATING transition (revival - ride returns to operation)

## Field Parity

### Photo Models
- Added 'photographer' field to RidePhoto and ParkPhoto models
- Maps to frontend 'photographer_credit' field for full schema parity
- Includes corresponding migrations for both apps

### Serializers
- Added 'photographer' to RidePhotoSerializer and ParkPhotoSerializer read_only_fields

backend/apps/api/v1/rides/serializers.py

@@ -117,6 +117,7 @@ class RidePhotoOutputSerializer(serializers.ModelSerializer):
             "image_url",
             "image_variants",
             "caption",
+            "photographer",
             "alt_text",
             "is_primary",
             "is_approved",
@@ -156,6 +157,7 @@ class RidePhotoCreateInputSerializer(serializers.ModelSerializer):
         fields = [
             "image",
             "caption",
+            "photographer",
             "alt_text",
             "photo_type",
             "is_primary",
@@ -169,6 +171,7 @@ class RidePhotoUpdateInputSerializer(serializers.ModelSerializer):
         model = RidePhoto
         fields = [
             "caption",
+            "photographer",
             "alt_text",
             "photo_type",
             "is_primary",