v0.3.0

Added

Always Encrypted Key Providers

• Azure Key Vault CMK provider (azure-identity feature)
  • RSA-OAEP and RSA-OAEP-256 key unwrapping
  • Key versioning support
  • Automatic credential management via Azure Identity SDK
• Windows Certificate Store CMK provider (sspi-auth feature, Windows only)
  • NCRYPT API integration for secure key operations
  • Certificate thumbprint-based key lookup

LOB Streaming

• Row::get_stream(index) and Row::get_stream_by_name(name) methods
• BlobReader integration for streaming LOB data via AsyncRead
• Improved memory efficiency for large binary/text columns

Change Tracking

• ChangeTrackingQuery builder for generating CHANGETABLE queries
• ChangeOperation enum (Insert, Update, Delete)
• ChangeMetadata struct for tracking version info
• ChangeTracking helper with SQL generation utilities
• SyncVersionStatus for validating sync state

Pool Improvements

• PoolMetrics extended with:
  • connections_idle_expired: Connections closed due to idle timeout
  • connections_lifetime_expired: Connections closed due to max lifetime
  • reaper_runs: Number of reaper task executions
  • peak_wait_queue_depth: Peak wait queue observed
  • avg_acquisition_time_us: Average acquisition time
• PoolStatus.wait_queue_depth: Current wait queue depth
• PoolConfig.health_check_query: Configurable health check SQL

Changed

• BREAKING: PoolConfig, PoolStatus, and PoolMetrics are now #[non_exhaustive]
  • Use builder pattern or Default::default() to construct
  • Allows future field additions without breaking changes
• Updated azure_identity SDK to 0.30 (API changes for ClientCertificateCredential)
• Updated azure_security_keyvault_keys SDK to 0.9.0

Fixed

• Azure Identity SDK compatibility: Updated ClientCertificateCredential usage for 0.30 API

Full Changelog: v0.2.3...v0.3.0