getLedgers returns inaccurate error message when requested ledger range outside of retention window

[sreuland]

What version are you using?

22.1.x

What did you do?

requested a ledger range that was not present in the RPC's current retention window:

curl --location 'https://soroban-testnet.stellar.org' \
--header 'Content-Type: application/json' \
--data '{
  "jsonrpc": "2.0",
  "id": 8675309,
  "method": "getLedgers",
  "params": {
    "startLedger": 1000,
    "pagination": {
      "limit": 2
    }
  }
}'

What did you expect to see?

an error response which sets error.code to standardized json-rpc code for client request error, -32602 and a error.message which describes the reason, should state requested ledger range is not in retention window data range of RPC.

What did you see instead?

a generic error message stating it was due to internal aspect:

{
    "jsonrpc": "2.0",
    "id": 8675309,
    "error": {
        "code": -32003,
        "message": "[-32003] request failed to process due to internal issue"
    }
}