Regista abertura de propostas e actas imutaveis por versao

database/migrations/2026_10_28_000017_create_proposal_openings.php

@@ -0,0 +1,37 @@
+<?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('proposal_openings', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('tenant_id')->constrained()->restrictOnDelete();
+            $table->foreignId('requisition_id')->constrained()->restrictOnDelete();
+            $table->foreignId('created_by')->constrained('users')->restrictOnDelete();
+            $table->unsignedInteger('revision');
+            $table->dateTime('opened_at');
+            $table->string('timezone', 64);
+            $table->dateTime('submission_deadline')->nullable();
+            $table->string('reference', 150);
+            $table->string('location', 300);
+            $table->text('reason');
+            $table->text('notes')->nullable();
+            $table->json('participants');
+            $table->json('annexes');
+            $table->json('snapshot');
+            $table->string('basis_hash', 64);
+            $table->timestamp('created_at');
+            $table->unique(['requisition_id', 'revision']);
+        });
+    }
+
+    public function down(): void
+    {
+        throw new LogicException('Preservar as actas e as suas versões.');
+    }
+};