Mid-week hire weeks (e.g. CDD starting Thursday) had their first day with no
contract, so the week was classified CUSTOM and the 25%/50% overtime bonuses
were disabled. Anchor the week's contract type/nature on the first contracted
day instead, so a 35h/39h hire week keeps its overtime tiers.
Dylan CHABOISSON week 12: 7h → 8h45 (7h × 1.25).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
