Potential experiments

fix(gateway): repair an exposed cutover source while frozen

feat(push): allow foreground notifications for other users Fixes: #907

fix(voice): make RNNoise the default noise suppression (#3103)

fix(gateway): skip the arm reload when peers already route here

fix(settings): use webapp url for oauth url Fixes: #901

fix(voice): correct audio track muting Fixes: #903

fix(core): sfx preferences not reloading on change Fixes: #910

fix(voice): random fixes and fixes for unnecessary app repaints

fix(gateway): reload the source after an exposed cutover abort

fix(gateway): keep a handoff on its target once the stop is sent

fix(composer): saved hight fixes

fix(gateway): wait for a calm source before arming guild pins

perf(gateway): fetch cached presences from owners in parallel

fix(gateway): refuse guild cutovers once the pin keeper armed

fix(gateway): reload pinned guilds right before arming the pins

fix(gateway): accept pin-aware routers and skip blocked peers

fix(gateway): unpin and verify every peer on guild pin release

fix(gateway): keep a handoff going once its backlog is forwarded

perf(gateway): filter handoff backlog captures on the source

fix(gateway): restore routes when a handoff controller dies