Final coverage round: 84.44% → 86.18% (target was 85%).
Two lib_ml/ tasks were stranded at 0% (1035 combined lines) because
the qsos → contacts table rename left stale refs in
PropagationAnalyze's SQL. Fixed:
- `FROM qsos q` → `FROM contacts q`
- `terrain_profiles tp ON tp.qso_id = q.id` → `tp.contact_id = q.id`
Adds test/mix/tasks/propagation_ml_tasks_test.exs with 4 tests:
- PropagationAnalyze end-to-end against empty DB (walks every section
header: correlation, binned factor, interaction, close).
- PropagationAnalyze with seeded contact + matching HRRR at both
endpoints yields a 1-row dataset (exercises derive_averages +
format_band + median + percentile helpers).
- PropagationAnalyze with a pre-2016-06-30 contact is excluded by the
WHERE clause.
- PropagationTrain on empty hrrr_profiles raises the expected Nx
"cannot build empty tensor" error after walking header + load path.
215 → 221 properties, 2812 → 2846 tests, 0 failures.
Graham McIntire
080257f2c5