Tim 5843fda2d6 QA: harden DTFB player sync receiver ...

Applies 6 fixes to sync.php found during QA of the player-sync feature:
1. Normalise non-UTF-8 (latin1/Win-1252) payloads -> fixes silent 0-row imports
2. Fail loudly (success=false) when N rows parse but nothing is added/updated
3. Remove dead \ block (undefined-variable notice)
4. Gate mass-deactivation: skip the sweep when a payload carries < 50% of an
   org's currently-active members (configurable via sync_deactivation_min_ratio,
   default 0.5); adds/updates still proceed, skipped sweeps return warnings
5. Use a single DB clock (NOW()) for staging session id/cleanup
6. Enforce Passnummer format ^[0-9]{2}-[0-9]{4,6}\$ (parity with manual import)

Adds tests/dtfb-player-sync/FINDINGS.md documenting the findings and fixes.
End-to-end validation is to be done on the staging environments.

2026-06-04 11:41:50 +02:00

..

FINDINGS.md

QA: harden DTFB player sync receiver

2026-06-04 11:41:50 +02:00