_offc_micro_narr.nx

Micro-test for the off-C runtime crash diagnosis. Imports nx_narr, calls narr_func_enter directly with no Tier-3 weaving on top. Goal: isolate whether the crash in nxc_self.elf is in narr_func_enter itself, OR in some other code path. Compile with anchor A: exits 42 ✓ (gcc-built compiler) Compile with anchor B: if exits 42 → narr_func_enter is fine, crash is elsewhere if crashes → narr_func_enter codegen is broken in nxc.elf