fix(kvstore): ensure CredentialsManager is registered in chunk_worker

Previously, it was not properly registered if some datasources were
excluded via NodeJS conditions.

src/kvstore/backend.ts

@@ -14,6 +14,7 @@
  * limitations under the License.
  */
 
+import "#src/credentials_provider/shared_counterpart.js";
 import type { ChunkManager } from "#src/chunk_manager/backend.js";
 import type { SharedCredentialsManagerCounterpart } from "#src/credentials_provider/shared_counterpart.js";
 import type { CompletionResult } from "#src/kvstore/context.js";