Add migration file for work group masters

database/migrations/2025_08_13_115631_create_work_group_masters_table.php

@@ -0,0 +1,46 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+
+    public function up(): void
+    {
+        $sql = <<<'SQL'
+            CREATE TABLE work_group_masters (
+                id					                BIGINT GENERATED always AS IDENTITY PRIMARY KEY,
+                plant_id                            BIGINT NOT NULL,
+
+                name		   					    TEXT DEFAULT NULL,
+                description		   				    TEXT DEFAULT NULL,
+                operation_number                    TEXT DEFAULT NULL,
+
+                created_at			                TIMESTAMP NOT NULL DEFAULT NOW(),
+                updated_at			                TIMESTAMP NOT NULL DEFAULT NOW(),
+                deleted_at			                TIMESTAMP,
+
+                created_by                          TEXT DEFAULT NULL,
+
+                unique(plant_id, name),
+                unique(plant_id, operation_number),
+                FOREIGN KEY (plant_id)              REFERENCES  plants (id)
+            );
+        SQL;
+        DB::statement($sql);
+    }
+
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('work_group_masters');
+    }
+};