mesa-upgrade

Operator runbook for the Mina Mesa hardfork upgrade rehearsal on the mesa-mut network, driven by the mina-mcp-server get_upgrade_status tool. Use when working against --network mesa-mut, when a user asks "what phase is the Mesa upgrade in", "can I still transact on mesa-mut", "when does the hardfork happen", or when you need to decide whether a send/transaction will be accepted before the fork. Explains how to read…