chore(app-start): Add screen total referrer (#63192)

This referrer is for the metrics ribbon at the top of the screen summary
page for app start.

Author: narsaynorath

src/sentry/api/endpoints/organization_events.py

@@ -85,6 +85,7 @@
     Referrer.API_STARFISH_MOBILE_STARTUP_EVENT_SAMPLES.value,
     Referrer.API_STARFISH_MOBILE_STARTUP_SPAN_TABLE.value,
     Referrer.API_STARFISH_MOBILE_STARTUP_LOADED_LIBRARIES.value,
+    Referrer.API_STARFISH_MOBILE_STARTUP_TOTALS.value,
 }
 
 API_TOKEN_REFERRER = Referrer.API_AUTH_TOKEN_EVENTS.value

src/sentry/snuba/referrer.py

@@ -431,6 +431,7 @@ class Referrer(Enum):
     API_STARFISH_MOBILE_STARTUP_EVENT_SAMPLES = "api.starfish.mobile-startup-event-samples"
     API_STARFISH_MOBILE_STARTUP_SPAN_TABLE = "api.starfish.mobile-spartup-span-table"
     API_STARFISH_MOBILE_STARTUP_LOADED_LIBRARIES = "api.starfish.mobile-startup-loaded-libraries"
+    API_STARFISH_MOBILE_STARTUP_TOTALS = "api.starfish.mobile-startup-totals"
 
     API_SPAN_SAMPLE_GET_BOUNDS = "api.spans.sample-get-bounds"
     API_SPAN_SAMPLE_GET_SPAN_IDS = "api.spans.sample-get-span-ids"