flowkey:raven (Sentry legacy SDK) is dead on Meteor 3 and, with the old
sentry.comunes.org DSN unreachable, spammed the boot log with 502s on every
exception. Replaced by the modern SDKs (8.x) behind the same ravenLogger.log()
facade so the 6 call sites are unchanged. Empty DSN -> plain console logger
(same behavior as before).
End-to-end verified against a real backend: GlitchTip deployed on aaron
(Sentry-compatible, fits in ~1.5GB vs Sentry's 16GB), fronted at
sentry.comunes.org. A test exception sent from the dev server appeared in
GlitchTip within seconds. REST smoke byte-identical (12/12).
