fix(scanner): make distributed usage convergence authoritative (#5151)

* fix(scanner): make distributed usage cycles authoritative

* fix(scanner): close distributed refresh races

* fix(config): align scanner reload integration

* fix(admin): scope config test helpers

* fix(scanner): harden distributed usage convergence

* fix(scanner): preserve rolling activity compatibility

* fix(admin): expose non-secret optional config values

* fix(scanner): acknowledge distributed dirty usage

* fix(ecstore): make bucket mutations cancellation safe

* fix(scanner): preserve pending dirty acknowledgements

* test(obs): account for superseded scanner metric

* fix(api): reject excess detached bucket mutations

* test: close scanner convergence coverage gaps

* fix(scanner): make path tracking cleanup one-shot

---------

Co-authored-by: Henry Guo <marshawcoco@users.noreply.github.com>
Co-authored-by: houseme <housemecn@gmail.com>

crates/test-utils/src/data_usage_snapshot_tests.rs

@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-use rustfs_data_usage::{BucketUsageInfo, DataUsageInfo};
+use rustfs_data_usage::{BucketUsageInfo, DATA_USAGE_OBJECT_NAME, DataUsageInfo};
 use std::time::{Duration, SystemTime};
 
 use crate::TestECStoreEnv;
@@ -48,7 +48,7 @@ async fn data_usage_snapshot_recovery_wires_primary_backup_and_negative_cache()
         .init_bucket_metadata(false)
         .build()
         .await;
-    let primary = format!("{BUCKET_META_PREFIX}/.usage.json");
+    let primary = format!("{BUCKET_META_PREFIX}/{DATA_USAGE_OBJECT_NAME}");
     let backup = format!("{primary}.bkp");
     let last_update = SystemTime::UNIX_EPOCH + Duration::from_secs(100);
     let expected = snapshot("bucket-a", last_update);