Implementa planeamento de compras com marcos e responsabilidades por empresa

database/migrations/2026_10_28_000016_create_purchase_planning.php

@@ -0,0 +1,41 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::create('purchase_plan_items', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('tenant_id')->constrained()->restrictOnDelete();
+            $table->foreignId('department_id')->constrained()->restrictOnDelete();
+            $table->foreignId('requisition_id')->nullable()->unique()->constrained()->restrictOnDelete();
+            $table->foreignId('created_by')->constrained('users')->restrictOnDelete();
+            $table->foreignId('responsible_id')->constrained('users')->restrictOnDelete();
+            $table->string('title', 200);
+            $table->string('nature');
+            $table->unsignedInteger('version')->default(1);
+            $table->timestamps();
+        });
+        Schema::create('purchase_plan_milestones', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('tenant_id')->constrained()->restrictOnDelete();
+            $table->foreignId('purchase_plan_item_id')->constrained()->restrictOnDelete();
+            $table->foreignId('created_by')->constrained('users')->restrictOnDelete();
+            $table->string('label', 120);
+            $table->date('planned_on');
+            $table->date('actual_on')->nullable();
+            $table->unsignedInteger('version')->default(1);
+            $table->timestamps();
+            $table->unique(['purchase_plan_item_id', 'label']);
+        });
+    }
+
+    public function down(): void
+    {
+        throw new LogicException('Preservar o planeamento e o histórico das alterações.');
+    }
+};