fix: import directusApiUrl in services.ts

Added missing import of directusApiUrl from directus module to fix
ReferenceError in getVideoBySlug function.

Fixes: 5333bfd (fix: use native fetch for getVideoBySlug)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

packages/frontend/src/lib/services.ts

@@ -1,4 +1,4 @@
-import { getDirectusInstance } from "$lib/directus";
+import { getDirectusInstance, directusApiUrl } from "$lib/directus";
 import {
 	readItems,
 	registerUser,