Why: Dev top-level modules/core advanced to 7a98a7e7 (core PR #26, optional node id/source TS contract fields); check-pins requires the backend internal pin to match.
Evidence: go build and store/pgbus suites green with the bumped pin; check-pins green in the Dev worktree after this merge.
Impact: gitlink bump only (additive optional contract fields).
Refs: core PR #26.