[hasanbal]

Summary

Follows elliottech/zklighter-perps#5221, which raises the server-side range of /api/v1/orderBookOrders limit from [1:250] to [1:500].

The SDK checks this limit on the client side, so calls with limit > 250 fail pydantic validation before any request is sent:

- limit: Annotated[int, Field(le=250, strict=True, ge=1)]
+ limit: Annotated[int, Field(le=500, strict=True, ge=1)]

This PR updates order_book_orders, order_book_orders_with_http_info and order_book_orders_without_preload_content in lighter/api/order_api.py, and sets maximum to 500 in openapi.json. The edits are made by hand to match what the generator would output for the updated spec.

Merge only after #5221 is deployed: before that, the server still rejects limit > 250.

Link to Devin session: https://app.devin.ai/sessions/5aa2c74235e7430d8230f583c769fead
Open in Devin Desktop: https://app.devin.ai/desktop/session/5aa2c74235e7430d8230f583c769fead?variant=devin
Requested by: @hasanbal

[devin-ai-integration]

I'll fix CI failures and address comments from users with write access that start with 'Devin'.

• Disable automatic comment, CI, and merge conflict monitoring