feat(form-builder): form_field_configs relational table + non-validation key split + drop validation_rules JSON columns

api/app/Models/FormBuilder/FormField.php

@@ -51,7 +51,6 @@ final class FormField extends Model
         'help_text',
         'section',
         'options',
-        'validation_rules',
         'is_required',
         'is_filterable',
         'is_portal_visible',
@@ -70,7 +69,6 @@ final class FormField extends Model
     /** @var array<string, string> */
     protected $casts = [
         'options' => 'array',
-        'validation_rules' => 'array',
         'conditional_logic' => 'array',
         'role_restrictions' => 'array',
         'translations' => 'array',
@@ -116,6 +114,11 @@ final class FormField extends Model
         return $this->morphMany(FormFieldValidationRule::class, 'owner');
     }
 
+    public function configs(): MorphMany
+    {
+        return $this->morphMany(FormFieldConfig::class, 'owner');
+    }
+
     /**
      * Nuanced activity log (ARCH §17.1; S1 Phase 4b). Callers choose which
      * events are worth logging — e.g. created/deleted/restored, field_type