fix(ecstore): harden HotPath profiling boundaries (#5555)

* test(hotpath): gate mimalloc heap test by platform

Co-Authored-By: heihutu <heihutu@gmail.com>

* fix(ecstore): attribute HotPath CPU measurements to impls

Co-Authored-By: heihutu <heihutu@gmail.com>

* feat(ecstore): trace raw shard I/O with HotPath

Co-Authored-By: heihutu <heihutu@gmail.com>

* fix(obs): redact profiler and OPA endpoint diagnostics

Co-Authored-By: heihutu <heihutu@gmail.com>

* fix(ecstore): settle encoded queue accounting

Co-Authored-By: heihutu <heihutu@gmail.com>

* fix(ecstore): abort encoder producer on cancellation

Co-Authored-By: heihutu <heihutu@gmail.com>

---------

Co-authored-by: heihutu <heihutu@gmail.com>

crates/ecstore/src/erasure/coding/decode.rs

@@ -691,7 +691,7 @@ impl<R> ParallelReader<R>
 where
     R: crate::erasure::coding::ShardSource,
 {
-    #[hotpath::measure]
+    #[hotpath::measure(impl_type = "ParallelReader")]
     pub async fn read(&mut self) -> (Vec<Option<Vec<u8>>>, Vec<Option<Error>>) {
         // On the reconstruction-verifying GET path, read every live shard reader
         // in lockstep so all readers advance one block per stripe and stay
@@ -1505,7 +1505,7 @@ where
 }
 
 impl Erasure {
-    #[hotpath::measure]
+    #[hotpath::measure(impl_type = "Erasure")]
     pub async fn decode<W, R>(
         &self,
         writer: &mut W,