feat(slack): add referrer to issue alert reinstall nudge link (#118745)

Author: alexsohn1126

src/sentry/integrations/slack/message_builder/issues.py

@@ -548,7 +548,7 @@ def get_slack_app_update_nudge_block(self) -> SlackBlock:
         else:
             reinstall_url = org.absolute_url(
                 f"/settings/{org.slug}/integrations/slack/",
-                query="showInstallModal=1",
+                query="showInstallModal=1&referrer=slack_alert_nudge",
             )
             nudge_text = f"Ask Sentry questions and debug faster, <{reinstall_url}|reinstall Sentry Slack app>."
             nudge_type = "reinstall"

tests/sentry/integrations/slack/test_message_builder.py

@@ -1299,7 +1299,8 @@ def test_outdated_app_missing_app_mentions_scope(self) -> None:
         # Old install missing the mandatory app_mentions:read scope.
         org = self.organization
         reinstall_url = org.absolute_url(
-            f"/settings/{org.slug}/integrations/slack/", query="showInstallModal=1"
+            f"/settings/{org.slug}/integrations/slack/",
+            query="showInstallModal=1&referrer=slack_alert_nudge",
         )
         assert self._build_nudge_text(has_mentions_read_scope=False) == (
             f"Ask Sentry questions and debug faster, <{reinstall_url}|reinstall Sentry Slack app>."