Do not count optional Stratum setup rejections as shares

[0xjc65eth]

Summary

• track the request IDs used for optional Stratum V1 setup calls after authorization
• handle mining.suggest_difficulty and mining.extranonce.subscribe responses separately from share submit responses
• prevent optional setup rejections such as Method not found from being reported as rejected shares

Why

Some pools do not implement optional Stratum V1 methods and can return Method not found. Those responses are setup capability rejections, not share submit failures, so they should not pollute rejected share stats or dashboard rejection reasons.

Fixes #1383.

Testing

• git diff --check

Full firmware build was not run locally because idf.py is not installed in this shell and the Docker daemon is not running (/var/run/docker.sock is unavailable).

[0xjc65eth]

Closing this for now to reduce maintainer review load, per feedback from @mutatrum. I am keeping #1705 open as the single focused PR because it is small, UI-only, and already has an ack. Happy to revisit this later only if maintainers ask for it. Thanks for the feedback and for maintaining the project.