fix(rebalance): converge multipart data movement retries (#6057)

* fix(rebalance): converge multipart data movement retries

* fix(rebalance): harden multipart retry replacement

* fix(rebalance): isolate internal multipart uploads

* test(ecstore): adapt metadata mutation fixtures

* fix(rebalance): preserve transition metadata semantics

* refactor(ecstore): reuse internal metadata matcher

* Revert "refactor(ecstore): reuse internal metadata matcher"

This reverts commit c87ca0328f.

* refactor(rebalance): reuse data movement log constants

* fix(rebalance): isolate migration-owned state

* fix(rebalance): preserve pre-gate retry compatibility

crates/ecstore/src/set_disk/replication.rs

@@ -75,6 +75,7 @@ impl SetDisks {
             version_id,
             versioned: opts.versioned,
             version_suspended: opts.version_suspended,
+            include_part_checksums: true,
             ..Default::default()
         };
         let (fi, _, disks) = self
@@ -142,6 +143,7 @@ impl SetDisks {
             version_id,
             versioned: opts.versioned,
             version_suspended: opts.version_suspended,
+            include_part_checksums: true,
             ..Default::default()
         };
         let (fi, _, disks) = self