Changed #

• Replaced sqflite with sqlite3 package for pure Dart support
• Removed path_provider dependency to enable pure Dart compatibility
• Improved drain() method to process all queued entries, not just up to concurrency limit
• Enhanced markFailed() logic: entries with nextAttempt are now marked as queued for retry instead of failed

Fixed #

• Fixed drain() method to work correctly when scheduler is not running (autoStart: false)
• Fixed retry logic: failed entries with retry schedule are now properly requeued
• Fixed test timing issues with retry backoff delays

Added #

• Comprehensive dartdoc documentation for public API (20%+ coverage)
• Example file (example/example.dart) for pub.flutter-io.cn package requirements
• Improved API documentation with usage examples

Added #

• Core API with DurableOutbox facade
• OutboxStore interface with SQLite and Memory implementations
• OutboxTransport interface with HTTP implementation
• RetryPolicy with Decorrelated Jitter Backoff
• Idempotency key support
• Pause/Resume functionality
• Watch streams for queue state and counts
• Basic metrics support
• Foreground runtime with scheduler
• Examples and tests

Features #

• Offline queue with guaranteed delivery
• Automatic retry with configurable backoff
• Priority-based processing
• Delayed start support (notBefore)
• Channel-based queue organization
• Cross-platform support (mobile, desktop, web)