feat: add Integration Credentials CRUD and Deploy UI

Integration Credentials:
- Add IntegrationCredential model with encrypted payload
- Add full CRUD: ManageIntegrationCredentialsAction, 4 Tasks, Controller, Requests
- Add migration for integration_credentials table
- Add Vue pages: Index, Create, Edit
- AI tasks now read API keys from DB instead of .env
- Add sidebar menu item

Deploy UI:
- Add DeployTask with full deploy lifecycle management
- Extend DeployController with index, log, history endpoints
- Add Deploy/Index.vue with live polling and deploy log viewer
- Add sidebar menu item and QuickAction for Sveden

UI:
- Add 'key' icon to SidebarNavItem
- Change deploy button color to amber in Main.vue

app/Containers/Dashboard/Tasks/IntegrationCredentials/DeleteIntegrationCredentialTask.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace App\Containers\Dashboard\Tasks\IntegrationCredentials;
+
+use App\Containers\Dashboard\Models\IntegrationCredential;
+use App\Ship\Enums\CacheKeys;
+use Illuminate\Support\Facades\Cache;
+
+class DeleteIntegrationCredentialTask
+{
+    public function run(IntegrationCredential $credential): bool
+    {
+        $provider = $credential->provider;
+        $deleted = $credential->delete();
+
+        Cache::forget(CacheKeys::INTEGRATION_CREDENTIAL_PREFIX->value . $provider);
+
+        return $deleted;
+    }
+}