fix(cms): adjust caching behavior for development environment

- Modified cached function to bypass caching in development mode.
- Updated fetchOpenApi function to return cached data only if not in development mode, ensuring accurate API fetching during development.

src/lib/cms.ts

@@ -77,6 +77,7 @@ async function cached<T>(
   key: string,
   fn: () => Promise<T>,
 ): Promise<T> {
+  if (import.meta.env.DEV) return fn();
   const hit = cache.get(key);
   if (hit && hit.expires > Date.now()) return hit.value as T;
   const pending = inflight.get(key) as Promise<T> | undefined;
@@ -122,7 +123,7 @@ export function cacheStats(): { size: number; keys: string[] } {
  * Wird gecacht (einmal pro Request/Build).
  */
 export async function fetchOpenApi(): Promise<OpenApiSpec> {
-  if (openApiCache) return openApiCache;
+  if (openApiCache && !import.meta.env.DEV) return openApiCache;
   const base = getBaseUrl();
   const res = await fetch(`${base}/api-docs/openapi.json`);
   if (!res.ok) {