feat(storage): wire capacity/object perf tuning and add batch benchmark runners (#2628)

crates/ecstore/src/set_disk.rs

@@ -707,6 +707,10 @@ impl ObjectIO for SetDisks {
         tokio::spawn(async move {
             let _guard = read_lock_guard; // keep guard alive until task ends (None if optimization enabled)
             let mut writer = wd;
+            // Do not wrap the entire read+write pipeline in `disk_read_timeout`.
+            // `get_object_with_fileinfo` also waits on `writer`, so an outer timeout
+            // would incorrectly treat downstream backpressure as disk-read latency.
+            // Disk read timeouts must be enforced at the actual disk I/O operations.
             if let Err(e) = Self::get_object_with_fileinfo(
                 &bucket,
                 &object,
@@ -757,7 +761,6 @@ impl ObjectIO for SetDisks {
                 user_defined.insert(key.clone(), value.clone());
             }
         }
-
         let sc_parity_drives = {
             if let Some(sc) = GLOBAL_STORAGE_CLASS.get() {
                 sc.get_parity_for_sc(user_defined.get(AMZ_STORAGE_CLASS).cloned().unwrap_or_default().as_str())