docs: add CHANGELOG.md for v1.0.0

Author: Vibe Kanban

CHANGELOG.md

@@ -0,0 +1,35 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [1.0.0] - 2026-01-18
+
+### Added
+
+- **Multi-channel notifications** - Email, SMS, and Push notification support
+- **Broker-agnostic architecture** - Pluggable broker implementations
+- **RabbitMQ broker** - Full RabbitMQ support via `Notify.Broker.RabbitMQ`
+- **Serialization options** - JSON and MessagePack serialization
+- **LZ4 compression** - Optimized payload sizes with LZ4
+- **Batching** - Configurable batch sizes and max wait times per channel
+- **Concurrency control** - Tunable prefetch and concurrency settings
+- **Resilience hooks** - `INotificationRetryStrategy` and `INotificationCircuitBreaker`
+- **Observability** - Metrics via `System.Diagnostics.Metrics` under the `Notify` meter
+- **Pipeline support** - `INotificationPipeline` for custom middleware
+- **Options hot-reload** - Configuration changes via `IOptionsMonitor`
+- **Provider base class** - `ProviderBase<TOptions>` for easy provider implementation
+
+### Packages
+
+| Package | Description |
+|---------|-------------|
+| `Notify.Abstractions` | Shared contracts (`INotify`, `IProvider`, `NotificationPackage`) |
+| `Notify.Core` | Producer-side publishing, serialization, and compression |
+| `Notify.Hosting` | Worker-side consumption and provider dispatching |
+| `Notify.Broker.Abstractions` | Broker-agnostic abstractions |
+| `Notify.Broker.RabbitMQ` | RabbitMQ broker implementation |
+
+[1.0.0]: https://github.com/atakanatali/notify/releases/tag/v1.0.0