133dde6f1c
go.mod requires go 1.25.6 but the workflow was requesting go-version: '1.24'. With GOTOOLCHAIN=auto (the default), the runner auto-downloaded Go 1.25.6 which lacked the covdata sub-tool, causing the test job to fail with 'go: no such tool covdata' for all cmd/* packages. Changes: - Bump go-version from '1.24' to '1.25' to match the go.mod directive - Add a 'Pin toolchain' step that sets GOTOOLCHAIN=local, preventing any further auto-upgrade surprises regardless of future go.mod bumps Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Co-authored-by: multica-agent <github@multica.ai>