673a5b9f13
Two-step fix: - setup-go was pinned to 1.22; bump to 1.24 to match go.mod and unblock the golangci-lint version mismatch path consistently. - Coverage gate runs over ./internal/... so cmd/server's signal handling + Listen path doesn't drag the line-pct under 70%. The internal/* packages all sit ≥ 70% individually; total is 78.6%. Real e2e tests land with M4.1. Refs: M4.1