chore: add changesets and API reports for facets predicate support

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

.changeset/facets-predicate-backend.md

@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-catalog-backend': minor
+---
+
+Added support for predicate-based filtering on the `/entity-facets` endpoint via a new `POST` method. Supports `$all`, `$any`, `$not`, `$exists`, `$in`, `$contains`, and `$hasPrefix` operators.

.changeset/facets-predicate-client.md

@@ -0,0 +1,5 @@
+---
+'@backstage/catalog-client': minor
+---
+
+Added support for the `query` field in `getEntityFacets` requests, enabling predicate-based filtering with `$all`, `$any`, `$not`, `$exists`, `$in`, `$contains`, and `$hasPrefix` operators.

packages/catalog-client/report.api.md

@@ -280,6 +280,7 @@ export interface GetEntityAncestorsResponse {
 export interface GetEntityFacetsRequest {
   facets: string[];
   filter?: EntityFilterQuery;
+  query?: FilterPredicate;
 }
 
 // @public