Two performance fixes the property tests pinned down:
* CalibrationSampler.build_for_hour/1 walked every cell through
nearest_hrrr/3 twice — once in the producer and again in
build_sample. Now computed once into a (band, lat, lon) → hrrr_or_nil
map, halving the O(cells × profiles) scan (~10M comparisons saved
per fire at typical sizes).
* PartitionManager.ensure_quarterly_partitions/2 issued one
pg_inherits scan per (parent × lookahead). Refactored to one scan
per parent with in-memory coverage check across all quarters.
Property tests for both modules:
* PartitionManager: tile-coverage invariant (no gaps, no overlaps),
exact 3-month bounds, name format, multi-call idempotence,
multi-parent independence — caught a real NaiveDateTime sort bug
in the original test helpers. Default Enum.sort_by/2 falls back to
term comparison on NaiveDateTime; now uses NaiveDateTime as the
comparator module.
* CalibrationSampler: enqueued points = unique missing midpoints,
empty enqueue when fully covered, sample row count invariant under
HRRR availability.
Saved operational gotchas to CLAUDE.md (Oban leader election spans
all app=prop pods, kubectl exec deploy/prop ambiguity, half-year
partition coexistence, HRRR f000 publish lag).
3310 tests + 228 properties, 0 failures.
Partition list for hrrr_profiles + hrdps_profiles was hand-edited in
priv/repo/structure.sql; if no human extended it, writes for the next
quarter would silently fail at the worker level (Rust hrrr-point-worker
marks tasks failed; the calibration pipeline silently joins NULLs).
Adds:
* Microwaveprop.PartitionManager — runtime DDL helper. Quarter math via
a single integer index (year*4 + quarter) for rollover safety.
Coverage check via pg_inherits before CREATE so a quarterly target
inside an existing wider partition (some 2027 ones are half-year)
is treated as :exists rather than colliding.
* Microwaveprop.Workers.PartitionMaintenanceWorker — daily cron at
03:15 UTC, 4-quarter lookahead. Idempotent; cheap when nothing's
missing. lookback_quarters arg lets ops widen for catch-up.
Tests cover the create + idempotent re-run + name format + year
rollover paths via a synthetic parent created inside the sandbox
transaction (no DDL leaks into the shared test DB).
