chore: Don't count "in-market" limit order to the max number of limit orders per account

[fleupold]

Background

We are limiting the number of limit orders a single account can have to something like 50 (to avoid uncontrolled growth of the orderbook). This limit would historically not apply to market orders (swap orders that are expected to execute immediately).

However, with the recent change of submitting all orders with 0 fee amount, the backend no longer differentiates between swap (in market) limit orders and potentially long standing (out of market) limit orders.

This can cause issues with certain use cases where users are trying to create a lot of short lived swaps (e.g. dump.services).

Details

This issue tracks work to distinguish between limit orders that are currently expected to be executed (in market price) and not count those towards the total order limit per user.

Acceptance criteria

A user can dump more than 50 tokens at the same time without running into order limit restrictions.