Add Criterion benchmark for error conversion paths

CHANGELOG.md

@@ -3,6 +3,15 @@ All notable changes to this project will be documented in this file.
 
 ## [Unreleased]
 
+## [0.24.2] - 2025-10-18
+
+### Added
+- Introduced a Criterion benchmark (`benches/error_paths.rs`) covering
+  `Context::into_error` redaction scenarios and `ProblemJson::from_app_error`
+  conversions to track serialization hot paths.
+- Documented the benchmarking workflow in the README and exposed the suite via
+  `cargo bench --bench error_paths` with the default harness disabled.
+
 ## [0.24.1] - 2025-10-17
 
 ### Fixed

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "masterror"
-version = "0.24.1"
+version = "0.24.2"
 rust-version = "1.90"
 edition = "2024"
 license = "MIT OR Apache-2.0"
@@ -134,6 +134,7 @@ tonic = { version = "0.14", optional = true }
 
 [dev-dependencies]
 anyhow = { version = "1", default-features = false, features = ["std"] }
+criterion = "0.5"
 serde_json = "1"
 tokio = { version = "1", features = [
   "macros",
@@ -146,6 +147,10 @@ toml = "0.9"
 tempfile = "3"
 tracing-subscriber = { version = "0.3", features = ["registry"] }
 
+[[bench]]
+name = "error_paths"
+harness = false
+
 [build-dependencies]
 serde = { version = "1", features = ["derive"] }
 toml = "0.9"