[Szer]

When OCR truncates the expiry year in a labelled receipt validity range, the parser falls back to unrelated receipt dates. For example, valid from 24/09/26 to 03/10 can become March 10–October 21 because the receipt also includes a goods-return deadline.

Infer a missing end year from the range's start date, retaining day/month order and handling December-to-January rollover. Add both affected coupons as cached image regression fixtures and coverage for complete dates, separators, punctuation, truncated trailing separators, whitespace, and month-name ranges.

Validation:

• dotnet test tests/CouponHubBot.Ocr.Tests -c Release: 61 passed.
• Replayed 2,364 saved OCR responses through the pre-fix and fixed parsers using identical reference times: 2 date ranges corrected, 2,362 results unchanged, and no monetary differences. Both changed coupons were visually confirmed by the owner.
• Replay covers monetary/date parsing; it excludes native image barcode decoding. The remaining private corpus and comparison results are not included.

No database migration or backfill is included.