Implemented database migration for adding new fields (`json`, `sent_to_server`) in `events` table. Updated DAO methods to support the new fields and introduced `markSentToServer`. Enhanced Ozon transaction workflows with OCR-based extraction, event error handling improvements, and result reporting. Refactored `EventHandler` for streamlined task processing and stale event cleanup.
Implemented `EventWindow` for viewing events with pagination and table-based UI. Added database migration to remove `UNIQUE` constraint on `external_id` in `events`. Enhanced DAO methods for event retrieval, pagination, and transaction updates. Integrated OCR recognition in transaction scripts and streamlined event handling in services.
