fix: repair main build (swift clippy assert + ecstore multipart test ctx) (#4441)

* fix(swift): replace assert!(false) with panic! in expiration_worker test

clippy::assertions_on_constants fails the swift clippy CI job under -D warnings.

* fix(ecstore): add missing ctx field to multipart lock test store

The multipart list-parts lock test (#4437) constructs ECStore without the
ctx field added by the Phase 5 InstanceContext work (backlog#939). Both
landed on main independently, leaving a semantic conflict that breaks the
ecstore lib-test build (E0063). Adopt the process bootstrap context,
matching the existing bootstrap_ctx() test in store/mod.rs.

crates/ecstore/src/store/multipart.rs

@@ -417,6 +417,7 @@ mod tests {
             decommission_cancelers: RwLock::new(Vec::new()),
             start_gate: Mutex::new(()),
             pool_meta_save_gate: Mutex::new(()),
+            ctx: crate::runtime::instance::bootstrap_ctx(),
         }
     }
 

crates/protocols/src/swift/expiration_worker.rs

@@ -984,10 +984,7 @@ mod tests {
 
         let tracked = match worker.scan_all_objects_with_backend(&backend).await {
             Ok(tracked) => tracked,
-            Err(err) => {
+            Err(err) => panic!("scan candidates should be tracked: {err}"),
-                assert!(false, "scan candidates should be tracked: {err}");
-                0
-            }
         };
 
         assert_eq!(tracked, 2);