ChangelogHoldings
Clearer dates in uploaded files
Price and holdings files are read with one consistent set of date rules, and ambiguous dates are refused rather than guessed.
What changed
- Common date formats are recognised the same way when you preview a file and when you save it
- A date column whose day and month order cannot be told apart is refused with a message naming the column
- Invalid or blank dates are counted and reported instead of being dropped silently
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