New: Use database change streams when available (#18892)

app/api/server/v1/settings.js

app/assets/server/assets.js

app/authorization/server/streamer/permissions/emitter.js

app/dolphin/lib/common.js

app/integrations/server/lib/triggerHandler.js

app/lib/server/startup/userDataStream.js

app/metrics/server/index.js

app/metrics/server/lib/collectMetrics.js

app/metrics/server/lib/metrics.js

app/models/server/models/InstanceStatus.js

app/models/server/models/UsersSessions.js

app/models/server/models/_Base.js

app/models/server/models/_BaseDb.js

app/models/server/models/_oplogHandle.ts

app/models/server/models/_oplogUrlParser.js

app/models/server/oplogEvents.js

app/search/server/events/events.js

app/settings/server/functions/settings.ts

app/settings/server/index.ts

app/settings/server/observer.js