Sync Sing Box Schema

Trace the relevant upstream sources at HEAD

• Follow option structs under option/*.go, template docs in docs/configuration/**, and any prose that explains new fields.
• Identify the matching area in src/schema/** and plan changes that reuse existing shared fragments.
• When workload grows, parallelize by independent domains (DNS/Route/Rules, Shared helpers, protocol batches, Core/Service/Experimental) and merge findings before schema edits.

Update schemas with bilingual metadata

• Mirror naming patterns (export const X = z.object(...), export type X = z.infer<typeof X>).
• Add metadata via .meta(...), preserving both English and Chinese titles/descriptions when upstream provides both.
• When .zh docs are absent, translate from the official English text and keep terminology consistent with nearby fields or shared fragments.

Verify and document

• First pass: align docs and structs, then run bun run typecheck, bun run lint, bun run build (when exports change) and confirm generated schema outputs (e.g., schema.json, schema.zh.json) reflect the updates.
• Second pass: run a gap scan for missing zh metadata (a grep-style metadata check is optional) and patch any uncovered holes, noting where upstream lacks bilingual text.
• Confirm src/index.ts exports match any new modules or schema symbols.