The 20260509 ADR landed in docs/adr/ (plural) by mistake. Convention
is doc/adr/ (alongside the existing 00_*, 01_*, … docs and the
network-architecture/cicd-architecture ADRs that pre-existed there).
Note : 20260407-*.md files in the typo'd docs/adr/ are still untracked
(never committed) — separate cleanup task.