fix(catalog): only route facets to POST when query predicate is present

Preserve backward compatibility by keeping filter-only requests on the
existing GET endpoint. Only route to POST when query is present, matching
the pattern used by queryEntities.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Signed-off-by: Fredrik Adelöw <freben@gmail.com>

packages/catalog-client/src/CatalogClient.ts

@@ -479,17 +479,17 @@ export class CatalogClient implements CatalogApi {
     request: GetEntityFacetsRequest,
     options?: CatalogRequestOptions,
   ): Promise<GetEntityFacetsResponse> {
-    const { filter, query, facets } = request;
+    const { filter = [], query, facets } = request;
 
     // Route to POST endpoint if query predicate is provided
-    if (query || filter) {
+    if (query) {
       return this.getEntityFacetsByPredicate(request, options);
     }
 
     return await this.requestOptional(
       await this.apiClient.getEntityFacets(
         {
-          query: { facet: facets },
+          query: { facet: facets, filter: this.getFilterValue(filter) },
         },
         options,
       ),