step 1, 2 and 3 of the implementation plan

database/migrations/2026_02_03_083001_create_answers_table.php

@@ -0,0 +1,35 @@
+<?php
+
+declare(strict_types=1);
+
+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
+    {
+        Schema::create('answers', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('session_id')->constrained('questionnaire_sessions')->cascadeOnDelete();
+            $table->foreignId('question_id')->constrained()->cascadeOnDelete();
+            $table->string('value', 255)->nullable();
+            $table->text('text_value')->nullable();
+            $table->timestamps();
+
+            $table->unique(['session_id', 'question_id']);
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('answers');
+    }
+};