Transaction request for non existing address returns status code 200 (instead of 404)

Hi there, awesome API.

We are using `v1` and are getting unexpected 200 response codes when requesting transactions for invalid addresses.

[From the Redoc for `getApiV1AddressesP1Transactions`](https://api.ergoplatform.com/api/v1/docs/#operation/getApiV1AddressesP1Transactions)
```
https://api.ergoplatform.com/api/v1/addresses/{p1}/transactions
```

## Expected Behavior

1. Request `https://api.ergoplatform.com/api/v1/addresses/{invalid-address}/transactions`
2. API responds with **404 status code** (Not Found)

## Actual Behavior

1. Request `https://api.ergoplatform.com/api/v1/addresses/{invalid-address}/transactions`
2. API responds with **200 status code** (Success)

## Summarized

It would be nice if the API would produce the 404 for us, if possible.