Preserve Unicode Windows arguments when loading native models

AGENTS.md

@@ -58,6 +58,9 @@ readiness without completed release gates and recorded evidence.
   permission to index in a query session. Legacy workers need an explicit update,
   never a silent larger-context fallback. Keep private commitment, resident memory,
   model verification and cached startup measurements distinct.
+- Windows native workers must preserve UTF-16 arguments and explicitly convert
+  them to UTF-8 for ggml; never depend on the system ANSI code page. Keep genuine
+  Unicode model and relocated runtime/DLL tests, with owned fixture cleanup.
 - Treat native filesystem events as bounded hints; retain work across busy scans
   and verify periodically. Use targeted, cancellable reconciliation for events.
   Media hints must advance durable change revisions even with identical stats;