* feat(ghidra): enable Windows x64 read-only analysis
* test(ghidra): exercise native Windows runtime boundaries
* test(ghidra): verify current Windows inventory and isolate ACL observer
* fix(ghidra): align Windows admission and address P0 review
Invoke analyzeHeadless.bat through an absolute cmd.exe with fixed interpreter switches, quoted arguments, delayed expansion disabled, and fail-closed metacharacter and length checks. Isolate Windows home and temporary coordinates, hide provider windows, and terminate the P0 launcher tree through bounded taskkill cleanup. Advertise explicit limitations that this preview does not provide Job Object ownership, DACL enforcement, reparse-point authority, or hostile-target safety.