GrandBridge 0.1.116fj beta demo

Urgent demo first-install validity hotfix based on the accepted 0.1.116fg source. This package intentionally does not include the separate unaccepted 116fi BDEV/audio work.

Changes:
- Trial state remains keyed by the distributable build label, so 0.1.116fj has its own seven-day namespace.
- Installer/runtime anchor proof no longer depends on MachineGuid.
- ProgramData machine DPAPI state is redundant recovery material and is now best-effort; inability to write that optional copy no longer rejects an otherwise valid first install.
- The UI uses EXPIRED only for a real elapsed seven-day trial, not for storage/clock errors.
- VST2 x64/x86 hosting and embedded Shell helpers are included.

Clean first-install verification:
- Before installation, no 0.1.116fj anchor or state existed on the test machine.
- Official Setup created a current 0.1.116fj anchor.
- The isolated demo FX launched bridge_worker, loaded Archetype Nolly X, completed a verified audio round trip, and cleaned up successfully.
- Reinstalling the exact same Setup preserved the original anchor timestamp exactly.
- A second post-reinstall load test passed again.
- The installed normal/full GrandBridge 116fi was not modified.

Source checkpoint:
203d6baafde974a231eeffb29046d1383d79f162
Tag: v0.1.116fj-source
