Sandbox Architecture Refactoring

What changed: The sandbox implementation has been completely restructured from scattered individual functions into a centralized dZ manager object with a cleaner API.

Details:

• Before: 41 individual functions (eu(), dm8(), cm8(), gm8(), um8(), mm8(), etc.) handled different sandbox aspects
• After: Single dZ manager object (lines 277192-277216) with methods: initialize(), isSupportedPlatform(), checkDependencies(), getFsReadConfig(), getFsWriteConfig(), getNetworkRestrictionConfig(), wrapWithSandbox()
• Settings getters (Qv1, Iv1, Gv1) now use memoization for better performance (lines 279679-279691)
• New unified initialization via XS6() function (line 279607)
• Clean reset functionality via WS6() (line 279632)
• Public API (DQ object at line 279692) remains unchanged for backward compatibility
• Removed legacy functions from v2.0.42: eu() (line 220098), dm8() (line 220108), cm8() (line 220112), mm8() (line 220052), gm8() and um8() (lines 220040-220051), along with 35+ other sandbox-related functions
• Evidence: New dZ object at lines 277192-277216, old functions removed from v2.0.42 lines 220040-220112