OpenWeather reports no remaining quota (only 429 when over), so add an
in-app gauge that counts the calls PilotVault itself makes and shows them
against the plan's per-minute limit.
- Plugin: process-wide usage store bucketed per API key (hashed) into the
current minute and UTC day; a do() wrapper counts each request that
reaches OpenWeather (transport errors consume no quota, so uncounted).
Health and Invoke both route through it.
- New callsPerMinute config field (default 60) that cascades global -> org
-> user; plugin contract gains plugins.HealthUsage on Health.
- Web App: a "Calls per minute limit" field and an "API call usage" meter
in the OpenWeather card, shown after Test connection and cached.
- Counts reset on restart and cover only PilotVault's own calls (noted in
the UI); the account dashboard stays authoritative.
- Tests for per-key counting and minute/day rollover; rebuilt frontend.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
