fix(docker): index interrupted cleanup lookup and process it in batches

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

database/migrations/2026_10_28_214953_add_index_for_interrupted_docker_cleanup_executions.php

@@ -0,0 +1,45 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public $withinTransaction = false;
+
+    /**
+     * Supports DockerCleanupJob::failInterruptedExecutions(), which runs on every scheduler tick.
+     * Only unfinished executions are indexed, so the index stays small on large histories.
+     */
+    public function up(): void
+    {
+        if (DB::getDriverName() === 'pgsql') {
+            DB::statement('CREATE INDEX CONCURRENTLY IF NOT EXISTS idx_docker_cleanup_executions_unfinished_status_created ON docker_cleanup_executions (status, created_at) WHERE finished_at IS NULL');
+
+            return;
+        }
+
+        if (! Schema::hasIndex('docker_cleanup_executions', 'idx_docker_cleanup_executions_unfinished_status_created')) {
+            Schema::table('docker_cleanup_executions', function (Blueprint $table) {
+                $table->index(['status', 'created_at'], 'idx_docker_cleanup_executions_unfinished_status_created');
+            });
+        }
+    }
+
+    public function down(): void
+    {
+        if (DB::getDriverName() === 'pgsql') {
+            DB::statement('DROP INDEX CONCURRENTLY IF EXISTS idx_docker_cleanup_executions_unfinished_status_created');
+
+            return;
+        }
+
+        if (Schema::hasIndex('docker_cleanup_executions', 'idx_docker_cleanup_executions_unfinished_status_created')) {
+            Schema::table('docker_cleanup_executions', function (Blueprint $table) {
+                $table->dropIndex('idx_docker_cleanup_executions_unfinished_status_created');
+            });
+        }
+    }
+};