fix: disable remote configuration by default in Lambda (#797)

Author: zarirhamza

datadog_lambda/config.py

@@ -141,6 +141,11 @@ def _reset(self):
         "enabled" if config.fips_mode_enabled else "not enabled",
     )
 
+# Remote configuration relies on /dev/shm which is unavailable in Lambda.
+# Disable it before ddtrace loads to avoid the shared-memory warning.
+if "DD_REMOTE_CONFIGURATION_ENABLED" not in os.environ:
+    os.environ["DD_REMOTE_CONFIGURATION_ENABLED"] = "false"
+
 # disable css to prevent double counting in lambda
 os.environ["DD_TRACE_STATS_COMPUTATION_ENABLED"] = "false"