Bug: Testnet Prod should be on Ropsten

[api-Hypernova]

Describe the bug

$ cargo xdbg -d -b production generate -e identity -a 10
    Finished `dev` profile [unoptimized] target(s) in 0.31s
     Running `target/debug/xdbg -d -b production generate -e identity -a 10`
xdbg::app::generate using concurrency
        concurrency Concurrency(14)
Error: 
   0: API error: api client error api client at endpoint "/xmtp.xmtpv4.payer_api.PayerApi/PublishClientEnvelopes" has error status: Internal, message: "internal server error", details: [], metadata: MetadataMap { headers: {"date": "Thu, 28 Aug 2025 17:18:55 GMT", "content-type": "application/grpc", "content-length": "0"} }
   1: api client error api client at endpoint "/xmtp.xmtpv4.payer_api.PayerApi/PublishClientEnvelopes" has error status: Internal, message: "internal server error", details: [], metadata: MetadataMap { headers: {"date": "Thu, 28 Aug 2025 17:18:55 GMT", "content-type": "application/grpc", "content-length": "0"} }

Location:
   xmtp_debug/src/app/clients.rs:118
error publishing group message: rpc error: code = Internal desc = error publishing identity update: Post "https://xmtp-testnet.g.alchemy.com/v2/VB4wowVdpg22Obz-gjoUhGJnGbjC67eN": context canceled

All testnet envs should be using ropsten URLs.

Expected behavior

XDBG should function as expected.

Steps to reproduce the bug

Execute the following on libxmtp latest main:

cargo xdbg -d -b staging generate -e identity -a 10