fix: mismatch with sdk types causing build error

[abromberg]

Build was failing due to mismatch with @openrouter/sdk types. Simply renamed models.Sort to models.ProviderSort and it now builds.

Excerpt from build logs before patch:

DTS Build start
DTS Build start
src/types/openrouter-chat-settings.ts(119,19): error TS2694: Namespace '"[MYPATH]/Documents/ai-sdk-provider/node_modules/@openrouter/sdk/esm/models/index"' has no exported member 'Sort'.

Error: error occurred in dts build
    at Worker.<anonymous> ([MYPATH]/Documents/ai-sdk-provider/node_modules/tsup/dist/index.js:1545:26)
    at Worker.emit (node:events:518:28)
    at MessagePort.<anonymous> (node:internal/worker:268:53)
    at [nodejs.internal.kHybridDispatch] (node:internal/event_target:827:20)
    at MessagePort.<anonymous> (node:internal/per_context/messageport:23:28)
DTS Build error
src/types/openrouter-chat-settings.ts(119,19): error TS2694: Namespace '"[MYPATH]/Documents/ai-sdk-provider/node_modules/@openrouter/sdk/esm/models/index"' has no exported member 'Sort'.

 ELIFECYCLE  Command failed with exit code 1.
npm error code 1
npm error path [MYPATH]/Documents/ai-sdk-provider
npm error command failed
npm error command sh -c pnpm run build
npm error A complete log of this run can be found in: [MYPATH]/.npm/_logs/2025-11-22T15_59_22_489Z-debug-0.log

After the fix it now builds correctly.