All 7 ACs verified. No code fixes required: boundary logic (<=), category
map, callsign prefix guard, altitude fallback thresholds, empty-category
guard, and type annotations are all correct. 89/89 tests pass, ruff clean.
Added two deferred items: hardcoded _AIRLINE_PREFIXES subset and A-category
military aircraft misclassification. Story and sprint-status marked done.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Matt Edholm
be32469284