Fixes:
- Fix stale LoD NI display-list ownership crashes in RT64 by using the shared owner-aware resolver for NI
G_DL, BranchZ, and BranchW targets. - Require live NI display-list targets to pass bounded structural display-list validation before RT64 interprets them, preventing MIPS overlay code from being parsed as GBI.
Validated:
- Manual retest of the issue #20 Renon/merchant route no longer crashes.