Per audit recommendations §6.2 (rec 5-9). Ports 14 RoP rules from
youpc's deadline calc into paliad.deadline_rules so they're surfaceable
in the timeline (course-of-proceedings) Fristenrechner mode in addition
to the existing trigger-event mode.
Adds 4 new proceeding types and extends 2 existing trees:
- UPC_DAMAGES (new) — Schadensbemessung (R.137.2, R.139 reply, R.139 rejoin)
- UPC_DISCOVERY (new) — Bucheinsicht (R.142.2, R.142.3 reply, R.142.3 rejoin)
- UPC_COST_APPEAL (new) — Berufung Kostenentscheidung (R.221.1)
- UPC_APP_ORDERS (new) — 15-day order-flavor (R.220.2, R.220.3, R.237 b, R.238.2)
- UPC_INF extended — R.151 chained off inf.decision
- UPC_APP extended — decision-flavor cross-appeal pair (R.237 a, R.238.1)
Total: 14 RoP rules across 5 families. New types appear in the
proceeding-type picker via deadlines.upc_damages / upc_discovery /
upc_cost_appeal / upc_app_orders i18n keys (DE + EN).
Design notes in the migration explain why some rules live in their own
proceeding type (when the legal anchor differs from UPC_INF/UPC_APP's
trigger date) vs being chained off existing rules.
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