Release v7.121.0

Added

• Commit and pull-request procedures and terminal-output guidance are available as the cratis-commits-and-pull-requests and cratis-rtk skills in every profile. Always-on rules direct agents to load the relevant procedure before acting. (part of #815)

Changed

• Source-code quality, framework-contribution and glossary guidance loads for matching files rather than every session. History, release, authorization and work-artifact safety requirements remain always on. (part of #815)