Create LXR Mining Launch Site for v2 Activation Barrier

Summary

Create a new launch site to guard the LXR mining feature activation in the v2 core protocol.

Background

The LXR mining signature type implementation needs to be guarded behind a version tag for controlled activation. Following the pattern used in previous releases, we need a launch site that acts as an activation barrier for the mining functionality.

Requirements

• Define a new launch site name for LXR mining activation (e.g., LXRMiningV1 or MiningSignatureV1)
• Add the launch site to the protocol version configuration
• Ensure all mining-related code paths check this launch site before execution
• Document the activation process and requirements

Acceptance Criteria

• Launch site name is defined and approved
• Launch site is added to version configuration
• Documentation updated with activation process
• Tests verify mining code is properly guarded

Related

• Epic: &37
• Specification: 32-lxr-mining.md