feat: extend hotpath coverage across crates

Add opt-in hotpath feature surfaces to every workspace crate and wire the root rustfs feature passthrough for function, allocation, and CPU profiling.

Add a focused set of function-level measurements for scanner, heal, lock, target replay, IAM, KMS, Keystone, trusted proxy, and capacity paths without adding request-scoped primitive wrappers.

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

crates/rio/Cargo.toml

@@ -30,9 +30,32 @@ workspace = true
 
 [features]
 default = []
-hotpath = ["hotpath/hotpath", "hotpath/tokio", "hotpath/futures", "hotpath/reqwest-0-13"]
-hotpath-alloc = ["hotpath/hotpath-alloc"]
-hotpath-cpu = ["hotpath", "hotpath/hotpath-cpu"]
+hotpath = [
+    "hotpath/hotpath",
+    "hotpath/tokio",
+    "hotpath/futures",
+    "hotpath/reqwest-0-13",
+    "rustfs-config/hotpath",
+    "rustfs-io-metrics/hotpath",
+    "rustfs-tls-runtime/hotpath",
+    "rustfs-utils/hotpath",
+]
+hotpath-alloc = [
+    "hotpath",
+    "hotpath/hotpath-alloc",
+    "rustfs-config/hotpath-alloc",
+    "rustfs-io-metrics/hotpath-alloc",
+    "rustfs-tls-runtime/hotpath-alloc",
+    "rustfs-utils/hotpath-alloc",
+]
+hotpath-cpu = [
+    "hotpath",
+    "hotpath/hotpath-cpu",
+    "rustfs-config/hotpath-cpu",
+    "rustfs-io-metrics/hotpath-cpu",
+    "rustfs-tls-runtime/hotpath-cpu",
+    "rustfs-utils/hotpath-cpu",
+]
 
 [dependencies]
 hotpath.workspace = true