feat: adiciona migration

database/migrations/2026_04_15_000001_create_unit_contracts_table.php

@@ -0,0 +1,27 @@
+<?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('unit_contracts', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('unit_id')->constrained('units')->cascadeOnDelete();
+            $table->string('name');
+            $table->string('file_url');
+            $table->timestamps();
+            $table->softDeletes();
+
+            $table->index('unit_id');
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('unit_contracts');
+    }
+};