Function rewrite_schema_names 

pub(crate) fn rewrite_schema_names(
    statements: &mut [Statement<Raw>],
    schema_name: &str,
    suffix: &str,
)

Rewrite schema names in parsed mod statements by appending a suffix.

Applies suffix-based renaming to all UnresolvedSchemaName nodes in the given statements using the auto-generated VisitMut traversal. Matches the last identifier in each schema name (the schema part), so both schema and db.schema forms are handled.

Arguments

• statements - Parsed mod statements to rewrite (mutated in place)
• schema_name - The original schema name to match
• suffix - The suffix to append (e.g., "_staging")