- CoreComponents.safe_row_id: four function heads dispatch on the row
shape (atom-key map, string-key map, other map fallback, non-map)
instead of a cond with Map.has_key? checks.
- Api.V1.CallsignController.validate_callsign: check_callsign_format/2
splits the validation success/failure branches into two clauses; the
binary-vs-everything-else dispatch stays in validate_callsign/1.
Adds 5 integration tests for the CallsignController covering invalid,
not-found, success, case-normalization, and length-limit paths. The
test file is async:false because it shares the rate-limiter ETS with
other API tests and could otherwise trip the 100/min per-IP cap.
Graham McIntire
fc5e91479b