refactor(ecstore): scope dead code allowances (#4098)

crates/ecstore/src/client/mod.rs

@@ -12,6 +12,9 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+// #730: S3 client compatibility models are kept while ECStore callers move to narrower facades.
+#![allow(dead_code)]
+
 pub mod admin_handler_utils;
 pub mod api_bucket_policy;
 pub mod api_error_response;