TUL/Script for correcting dc.date.issued formats

[jr-rk]

Phases	MS	MM	MK	JR	JM	Total
ETA	0	0	0	0	0	0
Developing	0	0	0	0	0	0
Review	0	0	0	0	0	0
Total	-	-	-	-	-	0
ETA est.						0
ETA cust.	-	-	-	-	-	0

Problem description

Wrong date formats (e.g., d.m.yyyy, m.yyyy, ...) corrected by new updater option --fix-date-format.
This mode corrects date formats in existing dc.date.issued fields without using other metadata fields.

Behavior:

• Null/empty values: Kept untouched
• Year-only values (YYYY): Kept as-is (e.g., 2020 stays 2020)
• Full dates with wrong format: Converted to YYYY-MM-DD (e.g., 30.5.2025 → 2025-05-30)
• Partial dates: Converted to year-only format (e.g., 5/2025 → 2025)
• Anomalies: Unparseable dates are logged and reported

(Edited the functionality of add_metadata.py added here)