chore: update document approval workflow and bug fixes

Modules/ApprovalWorkflow/app/Enums/ApprovalChainStatus.php

@@ -0,0 +1,31 @@
+<?php
+
+namespace Modules\ApprovalWorkflow\Enums;
+
+enum ApprovalChainStatus: string
+{
+    case Pending = 'pending';
+    case InReview = 'in_review';
+    case Approved = 'approved';
+    case Rejected = 'rejected';
+
+    public function label(): string
+    {
+        return match ($this) {
+            self::Pending => 'Pending',
+            self::InReview => 'In Review',
+            self::Approved => 'Approved',
+            self::Rejected => 'Rejected',
+        };
+    }
+
+    public function allowedTransitions(): array
+    {
+        return match ($this) {
+            self::Pending => [self::InReview, self::Rejected],
+            self::InReview => [self::Approved, self::Rejected],
+            self::Approved => [],
+            self::Rejected => [self::Pending],
+        };
+    }
+}