tree 28023cc051594f4f76494473963ad231a03483dd
parent c28c01b5034eb361ce3dd9e1a054afd9427dea00
author Marc Kupietz <kupietz@ids-mannheim.de> 1781879770 +0200
committer Marc Kupietz <kupietz@ids-mannheim.de> 1781890742 +0200

Normalise free-text creatDate to ISO for Krill type:date fields

Krill type:date fields expect an ISO date (YYYY[-MM[-DD]]), but creatDate
arrives in several free-text shapes. The previous naive '.'->'-' replacement
only worked for the canonical year-first form (1932.03.03) and mangled the
day-first forms found e.g. in RPK, optionally preceded by a weekday name:
"Donnerstag, 04.10.2018" became "Donnerstag, 04-10-2018".

Add normalizeKrillDate(), which extracts an ISO date from such values:
day-first DD.MM.YYYY (with optional leading weekday/comma) and year-first
YYYY.MM.DD both become YYYY-MM-DD; already-ISO values and the partial
YYYY.MM / YYYY forms pass through; for a date range the first date wins.
Wired into both creatDate -> creationDate and the plain <date> -> pubDate
fallback; the structured <pubDate type=year|month|day> path is untouched.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Change-Id: Ie546909f1a17e78d12a3139c8120bff12e1ea3a6