Validate generated fonts for package, trimming, and AOT

[Happypig375]

Parent: #191

Validate and finalize the generated bundled-font runtime across package, trimming, AOT, startup, and retained-memory dimensions.

Acceptance criteria

• use Benchmark math-font startup allocations and retained memory #293's exact environment/schema to compare raw-parser baseline versus generated runtime for every bundled face and global switching
• record package/assembly/generated-data sizes, startup time/allocations, retained memory, and parser count without correctness thresholds
• publish deterministic generated-C# versus compact-binary comparison and selected-format rationale
• run representative trimmed and NativeAOT builds where supported; document platform limitations precisely
• verify NuGet contains generated data and no separately downloaded/LFS runtime dependency
• complete regeneration/hash/schema CI and full unchanged frontend goldens