AmneziaWG clients accept a randomised PersistentKeepalive range such as 15-25,
which makes keepalive timing harder to fingerprint; the panel only stored a
single number. A client's keepalive may now be a range, validated the way
AmneziaWG parses it. The downloadable .conf and vpn:// profile carry the range,
Clash/Mihomo output gets its lower bound, and plain WireGuard stays scalar-only.
The range lives in an additive wg_keep_alive_range column, so the integer
column and an older panel binary keep working after a rollback.
A new emit_jsonschema.go walks the same allow-listed structs as the zod/types/examples emitters and writes generated/schemas.ts (SCHEMAS). build-openapi mounts it under components.schemas and points each typed response obj at a $ref instead of an untyped {} blob, so Swagger renders real models and openapi-generator can emit clients.
Also add a vitest guard that safeParses every EXAMPLES entry against its generated zod schema, reviving the previously unused generated/zod.ts and catching drift between the example and schema emitters.