refactor: rename agreement to proof

backend/database/factories/InternshipFactory.php

@@ -27,7 +27,7 @@ class InternshipFactory extends Factory
             'year_of_study' => fake()->randomElement([1, 2, 3, 4, 5]),
             'semester' => fake()->randomElement(["WINTER", "SUMMER"]),
             'position_description' => fake()->jobTitle(),
-            'agreement' => null,
+            'proof' => null,
             'report' => null,
             'report_confirmed' => false,
         ];

backend/database/migrations/2025_10_20_193012_create_internships_table.php

@@ -4,8 +4,7 @@ use Illuminate\Database\Migrations\Migration;
 use Illuminate\Database\Schema\Blueprint;
 use Illuminate\Support\Facades\Schema;
 
-return new class extends Migration
-{
+return new class extends Migration {
     /**
      * Run the migrations.
      */
@@ -20,7 +19,7 @@ return new class extends Migration
             $table->unsignedSmallInteger("year_of_study")->nullable(false);
             $table->enum("semester", ["WINTER", "SUMMER"])->nullable(false);
             $table->string("position_description")->nullable(false);
-            $table->binary("agreement")->nullable(true);
+            $table->binary("proof")->nullable(true);
             $table->binary("report")->nullable(true);
             $table->boolean("report_confirmed")->nullable(false)->default(false);
             $table->timestamps();