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/kms/Cargo.toml

@@ -28,6 +28,7 @@ categories = ["cryptography", "web-programming", "authentication"]
 workspace = true
 
 [dependencies]
+hotpath.workspace = true
 # Core dependencies
 async-trait = { workspace = true }
 tokio = { workspace = true, features = ["fs", "io-util", "macros", "rt-multi-thread", "sync", "time"] }
@@ -84,3 +85,17 @@ tokio = { workspace = true, features = ["net", "test-util"] }
 
 [features]
 default = []
+hotpath = [
+    "hotpath/hotpath",
+    "hotpath/tokio",
+    "hotpath/reqwest-0-13",
+    "rustfs-security-governance/hotpath",
+    "rustfs-utils/hotpath",
+]
+hotpath-alloc = [
+    "hotpath",
+    "hotpath/hotpath-alloc",
+    "rustfs-security-governance/hotpath-alloc",
+    "rustfs-utils/hotpath-alloc",
+]
+hotpath-cpu = ["hotpath", "hotpath/hotpath-cpu", "rustfs-security-governance/hotpath-cpu", "rustfs-utils/hotpath-cpu"]

crates/kms/src/manager.rs

@@ -66,16 +66,19 @@ impl KmsManager {
     }
 
     /// Encrypt data with a master key
+    #[hotpath::measure]
     pub async fn encrypt(&self, request: EncryptRequest) -> Result<EncryptResponse> {
         self.backend.encrypt(request).await
     }
 
     /// Decrypt data with a master key
+    #[hotpath::measure]
     pub async fn decrypt(&self, request: DecryptRequest) -> Result<DecryptResponse> {
         self.backend.decrypt(request).await
     }
 
     /// Generate a data encryption key
+    #[hotpath::measure]
     pub async fn generate_data_key(&self, request: GenerateDataKeyRequest) -> Result<GenerateDataKeyResponse> {
         self.backend.generate_data_key(request).await
     }