Covers namespaced npm and Maven PURLs, a publish time under an alias of
a package row's ecosystem, and a PURL starting with the orphan prefix,
and checks the per-ecosystem versions against GetCacheStats' total.
Cooldown stores the publish time of every version it looks up, also of
packages nobody downloaded, which have no package row. The ecosystem stats
counted those versions as unattributed. They now count under the type of
their package PURL; only a PURL that can't be parsed stays unattributed.
- Add GetEcosystemStats, aggregating packages, versions, artifacts,
cache size, downloads and downloaded bytes per ecosystem
- Publish six proxy_ecosystem_* gauges from it on the existing
one-minute cache-stats tick
- Set and selectively delete rather than Reset, so no scrape lands on
a half-populated vector
- Report artifacts with no package row under "unattributed" rather
than dropping them, so the figures still add up
Part 2 of 6 splitting #381 up.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
