Merge queue

A serialized gate that rebases each change on the latest trunk, runs the full CI suite, and only then lands it — auto-rejecting or reverting any change that fails.

grounded in: doctrine principles.md SHIP/VERIFY/OBSERVE flow ('atomic, reversible, through the FULL gate' + CI as source of truth + auto-revert on red) combined with the trends 'Developer tooling and git ergonomic