- Add DefaultInvalidDateSentinel (1900-01-01) for invalid date handling
- Add optional invalidDateSentinel constructor parameter
- Add MapOrdinal override returning -1 for computed DateTime column
- Add GetDataTypeName override returning "datetime" for computed column
- Update ParseJdeDateTime with comprehensive validation:
- Validate date is positive
- Validate century (0 or 1)
- Validate year (0-99)
- Validate day of year (1-366 and respects leap year)
- Validate time components (hours 0-23, minutes/seconds 0-59)
- Add tests for all new functionality
Joseph Doherty
ae84cb3d75