Add localization quality audit and beta release gates

[joahpass]

What changed

• adds per-string UI review, screenshot audit, quality metrics, font cmap validation, and privacy-safe diagnostics
• upgrades display aliases to fingerprinted schema v2 and only applies approved UI reference sites
• adds stable release quality gates and a separate GitHub prerelease path
• publishes honest Chinese/Japanese/French coverage instead of a single misleading completion value

Validation

• 15 automated tests passed against the pristine Build 24640309 backup
• isolated apply/verify/diagnostic/restore passed: 1225 EXE strings, 1685 asset strings, zero font gaps, byte-identical restore
• Simplified Chinese: 2917/2917 translated, 1066/1066 glyphs, 0/2917 in-game reviewed, 0/7 display aliases connected
• stable release gate correctly rejects the current beta; prerelease packaging succeeds

Known limitation

Windows.Graphics.Capture fails on this maintainer machine with SetIsBorderRequired 0x80004002, so no screen is marked reviewed and the Workshop stable entry is intentionally unchanged.