Implement Keystone environment deployments

database/migrations/2025_03_27_121049_create_environments_table.php

@@ -0,0 +1,32 @@
+<?php
+
+use App\Models\Application;
+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('environments', function (Blueprint $table) {
+            $table->id();
+            $table->foreignIdFor(Application::class)->constrained()->cascadeOnDelete();
+            $table->string('name');
+            $table->string('branch');
+            $table->string('status')->default('pending');
+            $table->boolean('scheduler_enabled')->default(true);
+            $table->foreignId('scheduler_target_service_id')->nullable();
+            $table->string('scheduler_mode')->default('single');
+            $table->json('build_config')->nullable();
+            $table->timestamps();
+
+            $table->unique(['application_id', 'name']);
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('environments');
+    }
+};