Move hook registration to setup_once

Author: aliu39

sentry_sdk/integrations/launchdarkly.py

@@ -35,9 +35,7 @@ def __init__(self, client=None):
 
         if not client.is_initialized():
             raise DidNotEnable("LaunchDarkly client is not initialized.")
-
-        # Register the flag collection hook with the given client.
-        client.add_hook(LaunchDarklyHook())
+        self.ld_client = client
 
     @staticmethod
     def setup_once():
@@ -51,6 +49,12 @@ def error_processor(event, _exc_info):
         scope = sentry_sdk.get_current_scope()
         scope.add_error_processor(error_processor)
 
+        # Register the flag collection hook with the LD client.
+        ld_client = (
+            sentry_sdk.get_client().get_integration(LaunchDarklyIntegration).ld_client
+        )
+        ld_client.add_hook(LaunchDarklyHook())
+
 
 class LaunchDarklyHook(Hook):