Update integ-config.json

Author: abuabraham-ttd

scripts/gcp-oidc/conf/integ-config.json

@@ -11,6 +11,7 @@
     "core_attest_url": "https://core.uidapi.com/attest",
     "cloud_encryption_keys_metadata_path": "https://core.uidapi.com/cloud_encryption_keys/retrieve",
     "optout_api_uri": "https://optout.uidapi.com/optout/replicate",
+    "uid_instance_id_prefix": "unknown",
     "optout_s3_folder": "uid-optout-integ/",
     "runtime_config_store": {
         "type": "http",
@@ -19,4 +20,4 @@
         },
         "config_scan_period_ms": 300000
     }
-}
+}