tests: Temporarily turn on enable_frontend_peek_sequencing in CI

Author: ggevay

misc/python/materialize/mzcompose/__init__.py

@@ -184,7 +184,7 @@ def get_variable_system_parameters(
         ),
         VariableSystemParameter(
             "enable_frontend_peek_sequencing",
-            "false",
+            "true",
             ["true", "false"],
         ),
         VariableSystemParameter(

src/environmentd/tests/server.rs

@@ -262,7 +262,7 @@ fn setup_statement_logging_core(
         )
         .with_system_parameter_default(
             "enable_frontend_peek_sequencing".to_string(),
-            "false".to_string(),
+            "true".to_string(),
         )
         .start_blocking();
     let client = server.connect(postgres::NoTls).unwrap();