feat(form-builder): form_field_validation_rules table + polymorphic owner + scope + cascade

api/app/Enums/FormBuilder/FormFieldValidationRuleType.php

@@ -0,0 +1,36 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Enums\FormBuilder;
+
+/**
+ * Canonical catalogue of validation rule types stored relationally in
+ * `form_field_validation_rules` (ARCH-FORM-BUILDER §17.4). One case per
+ * legacy top-level key in the pre-WS-5b `validation_rules` JSON, minus
+ * the non-validation entries (`tag_categories`, `storage_disk` — moved
+ * to `form_field_configs` under ARCH §17.5) and the column-duplicates
+ * (`required`, `unique` — source of truth is `is_required` / `is_unique`
+ * on the parent row).
+ *
+ * Per-case `parameters` shape is enforced at the service layer, not by
+ * the enum — see `FormFieldValidationRuleService::assertSpecValid()`.
+ */
+enum FormFieldValidationRuleType: string
+{
+    case MinLength = 'min_length';
+    case MaxLength = 'max_length';
+    case MinValue = 'min_value';
+    case MaxValue = 'max_value';
+    case Regex = 'regex';
+    case EmailFormat = 'email_format';
+    case UrlFormat = 'url_format';
+    case PhoneE164 = 'phone_e164';
+    case AllowedMimeTypes = 'allowed_mime_types';
+    case MaxFileSize = 'max_file_size';
+    case MinSelected = 'min_selected';
+    case MaxSelected = 'max_selected';
+    case DateMin = 'date_min';
+    case DateMax = 'date_max';
+    case Callback = 'callback';
+}