Add Nightscout database size info row and alarm#697
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Nightscout's dbsize plugin exposes the Mongo data + index size at /api/v2/properties/dbsize. Poll it on a new 6 hour scheduler task and surface it two ways: - An optional "DB Size" info row showing used MiB and the percentage of the site's configured DBSIZE_MAX. - A new "Nightscout Database Size" alarm that fires at or above a percentage threshold, defaulting to 75% to match the urgent level of the plugin itself. The database fills over weeks, so the alarm defaults to day-only and never repeats at night. Nightscout still reports the property with a zero size when db.stats() fails, which would read as an empty database rather than a missing reading. Treat that as no reading, mirroring how the plugin's own pill hides itself in that case.
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Nightscout's
dbsizeplugin exposes the database size at/api/v2/properties/dbsize. A new scheduler task polls it every 6 hours and surfaces the result in two places.Info row — a new optional
DB Sizerow showing used MiB and the percentage of the site's configured limit. Hidden by default.Alarm — a new
Nightscout Database Sizealarm firing at or above a percentage threshold, defaulting to 75% to match the plugin's own urgent level. The database fills over weeks, so it defaults to daytime only.The percentage is measured against
DBSIZE_MAX, which is 496 MiB unless the site owner changed it. The info row therefore leads with the absolute MiB figure, and the alarm editor explains the caveat.