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chrislu
82fb366968
- Add OffsetSubscriber for managing offset-based subscriptions - Implement OffsetSubscription with seeking, lag tracking, and range operations - Add OffsetSeeker for offset validation and range utilities - Create SMQOffsetIntegration for bridging offset management with SMQ broker - Support all OffsetType variants: EXACT_OFFSET, RESET_TO_OFFSET, RESET_TO_EARLIEST, RESET_TO_LATEST - Implement subscription lifecycle: create, seek, advance, close - Add comprehensive offset validation and error handling - Support batch record publishing and subscription - Add offset metrics and partition information APIs - Include extensive test coverage for all subscription scenarios: - Basic subscription creation and record consumption - Offset seeking and range operations - Subscription lag tracking and end-of-stream detection - Empty partition handling and error conditions - Integration with offset assignment and high water marks - All 40+ tests pass, providing robust offset-based messaging foundation