Merge remote-tracking branch 'upstream/main' into pr871-fix

changelog.d/1209-layer-errors-english-in-data.md

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+- Keep Directions route errors, the Local ADS-B receiver error and Global
+  Context cohort reasons English in layer data; the Layers panel, Radio card
+  and awareness panel still show them in the interface language. The route
+  proxy's "routing busy" and "route proxy error" refusals are now translated
+  too (daikaginza, #1209).

changelog.d/1404-perimeters-stale.md

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+- Fire Perimeters and `get_fire_perimeters` say when WFIGS is unreachable and
+  the last snapshot is being shown (STALE, its age, "data may be stale"), and
+  that snapshot is served for at most 24 hours (quanticsoul4772, #1404).