feat(scheduled-tasks): add an option to run a task without a shell

Containers without sh (distroless or scratch images) could not run
scheduled tasks, because Coolify always ran the command with sh -c.
Turn off "Run in a shell" to split the command into arguments and run
it directly. The option is also in the API, the MCP tools, and the
server transfer.

Closes #8244

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

database/migrations/2026_11_03_202635_add_use_shell_to_scheduled_tasks_table.php

@@ -0,0 +1,22 @@
+<?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::table('scheduled_tasks', function (Blueprint $table) {
+            $table->boolean('use_shell')->default(true);
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::table('scheduled_tasks', function (Blueprint $table) {
+            $table->dropColumn('use_shell');
+        });
+    }
+};