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/ListIntegrationCredentialsTask.php

@@ -0,0 +1,14 @@
+<?php
+
+namespace App\Containers\Dashboard\Tasks\IntegrationCredentials;
+
+use App\Containers\Dashboard\Models\IntegrationCredential;
+use Illuminate\Database\Eloquent\Collection;
+
+class ListIntegrationCredentialsTask
+{
+    public function run(): Collection
+    {
+        return IntegrationCredential::orderByDesc('id')->get();
+    }
+}