Captures m's 2026-05-18 ratification of the new fristenrechner
proceeding-code convention `<jurisdiction>.<X>.<Y>` and the 5
sub-decisions: ccr.cfi is an illustrative peer that routes back to
inf.cfi with with_ccr; damages-appeal stays bundled into
upc.apl.merits; NZB at BGH is a flag, not a separate proceeding;
DPMA appeals stay generic with source differentiation at rule level.
This document is the source of truth for mig 096 (lands next) and the
post-mig proceeding_mapping.go.
