include sandbox (seatbelt, elevated, etc.) as in turn metadata header (#10946)

This will help us understand retention/usage for folks who use the
Windows (or any other) sandboxes

codex-rs/core/src/lib.rs

@@ -57,6 +57,7 @@ pub mod path_utils;
 pub mod personality_migration;
 pub mod powershell;
 mod proposed_plan_parser;
+mod sandbox_tags;
 pub mod sandboxing;
 mod session_prefix;
 mod stream_events_utils;