Bump version to 0.3.0

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: ezqy

CHANGELOG.md

@@ -4,7 +4,7 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/).
 
-## [Unreleased]
+## [0.3.0] - 2026-03-10
 
 ### Added
 - **Circuit breaker**: Per-handler circuit breaker. Opens after 5 consecutive failures, closes after 60s cooldown with half-open probe. New metrics: `qhook_circuit_breaker_opened_total`, `qhook_circuit_breaker_rejected_total`.

Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "qhook"
-version = "0.2.2"
+version = "0.3.0"
 edition = "2024"
 rust-version = "1.85"
 description = "Lightweight webhook gateway and workflow engine with queue, retry, and signature verification."

Cargo.toml

@@ -3,7 +3,7 @@ name: qhook
 description: Lightweight webhook gateway and workflow engine
 type: application
 version: 0.1.0
-appVersion: "0.2.2"
+appVersion: "0.3.0"
 home: https://totte-dev.github.io/qhook/
 sources:
   - https://github.com/totte-dev/qhook