[eric] analytics: add the 2 track_link_email sites I missed (sign-in + settings-save), matching haik/feat/ingest exactly

backend/apps/auth/router.py

@@ -76,6 +76,12 @@ def _sync_identity_to_service(settings_obj) -> None:
         _identify(props)
     except Exception as e:
         logger.debug("identify sync failed: %s", e)
+    if email:
+        try:
+            from backend.apps.service.analytics import track_link_email
+            track_link_email(email)
+        except Exception as e:
+            logger.debug("analytics link_email sync failed: %s", e)
 
 
 # ---------------------------------------------------------------------------

backend/apps/settings/settings.py

@@ -266,6 +266,9 @@ async def apply_settings_update(body: AppSettings, protect_fields: set[str] | No
             id_props["referral_source"] = body.user_referral_source
         if id_props:
             _identify(id_props)
+        if body.user_email:
+            from backend.apps.service.analytics import track_link_email
+            track_link_email(body.user_email)
 
     await save_settings_async(body)