Extrinsic for setting sn owner hotkey

[gztensor]

Description

Add admin extrinsic for sn owner and root to set the subnet owner hotkey.

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Other (please describe):

Checklist

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have run cargo fmt and cargo clippy to ensure my code is formatted and linted correctly
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

[vstam1]

Would it be possible to remove this call from the ProxyType::Owner scope? Keeping it there increases risk, as most new subnet owners run their validator on this hotkey and receive child key delegation from larger validators. If an adversary gains access to the proxy key, they could alter it for over a week. Although these issues might be partly remedied through validator coordination, it remains unfavorable for the subnet owner. Excluding this call from the Owner proxy scope or moving the extrinsic to the Subtensor pallet would effectively mitigate the risk.

[camfairchild]

Would it be possible to remove this call from the ProxyType::Owner scope? Keeping it there increases risk, as most new subnet owners run their validator on this hotkey and receive child key delegation from larger validators. If an adversary gains access to the proxy key, they could alter it for over a week. Although these issues might be partly remedied through validator coordination, it remains unfavorable for the subnet owner. Excluding this call from the Owner proxy scope or moving the extrinsic to the Subtensor pallet would effectively mitigate the risk.

Addressed, thanks

.