feat(form-builder): add ApplyStatus, DismissalReasonType, BindingTargetType enums (WS-6)

DismissalReasonType has six values; manually_resolved is intentionally
absent because Resolve and Dismiss are separate workflows (RFC V2).

Refs: RFC-WS-6.md §3 (Q4 partial-status separation), §4 (V2 dismiss enum)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

api/app/Enums/FormBuilder/ApplyStatus.php

@@ -0,0 +1,38 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Enums\FormBuilder;
+
+/**
+ * RFC-WS-6 §3 (Q4) — apply-state of a FormSubmission's binding pipeline.
+ * Distinct from {@see \App\Models\FormBuilder\FormSubmission::$identity_match_status},
+ * which tracks identity resolution (RFC O1).
+ */
+enum ApplyStatus: string
+{
+    case PENDING = 'pending';
+    case COMPLETED = 'completed';
+    case PARTIAL = 'partial';
+    case FAILED = 'failed';
+
+    public function isTerminal(): bool
+    {
+        return $this !== self::PENDING;
+    }
+
+    public function isOpen(): bool
+    {
+        return $this !== self::COMPLETED;
+    }
+
+    public function label(): string
+    {
+        return match ($this) {
+            self::PENDING => 'Wachtrij',
+            self::COMPLETED => 'Voltooid',
+            self::PARTIAL => 'Gedeeltelijk mislukt',
+            self::FAILED => 'Mislukt',
+        };
+    }
+}