## Why
Remote configuration reads need a bounded wait without disrupting valid in-flight work on connections that cannot reconnect.
## What changed
- Add `read_environment_config_with_timeout` to `ExecServerClient` and `Environment`, bounding RPC sending and receiving after connection establishment. Local reads retain their existing behavior.
- Return a typed `ExecServerError::RpcTimedOut` and classify it as retryable for read-only preparation.
- Share timeout handling with environment-info requests. Close the timed-out transport and request recovery only when a reconnect strategy exists; otherwise, keep the connection open.
## Testing
Add a regression test verifying that a timed-out configuration read preserves an in-flight stdio read and allows subsequent reads on the same connection, including after a late response.
GitOrigin-RevId: 6785d5846f4c3b07a6e7c505e359238609c3a6b6
Henry Levy
6e093c6081