spb/ai-atlas

Root cause of the null cheapest_frontier: the Redis API cache was not scoped to the database, so the dev API (:8331) and the
production-copy API (:8332), which share redis db 5, served each other's cached bodies and the cached frontier id set —
prod joined dev ids against its prices (0 rows) while `sample.frontier_offers` came from a body cached by the other process.
Cache keys are now `aia:api:<sha1(DATABASE_URL)[:8]>:…` and the frontier id set is re-validated against live canonical models
on every cache hit. Regression test asserts cheapest_frontier / sort=cheapest_frontier / price_frontier are non-null whenever
frontier offers exist.

Also: PRICE_CHANGED old/new values are {input,output} dicts → price_delta() (pulse median_percent, pulse/index/frontier items
with % and provider); /prices/index 30-day counters → {count, items[], definition}; /providers/{slug} deployments + removed
(90 d); /deployments status=active|delisted|all (current=0 ⇒ all); framework/library kind (normalised) + dataset summary
attributes + license_key derived on read; /open new_30d by release_date (first_seen_at only when unknown); /models best_price
(one lateral join); /families benchmark_best with scores (list + members); /benchmarks/matrix since/until on release_date and
observed_at/evaluated_at per cell; /pareto points carry context_length, parameter_count, release_date. docs/API.md updated.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>