Why: card sections were placeholders; gitlinks point the composite at backend a80d3c3 / frontend c1225bb (both merged component mains) so make test validates the shipping combination. Evidence: make test green in this worktree at these gitlinks (local log /tmp/i3-make-test.log; CI is authoritative); card edits are SELF. Impact: task card content + submodule pointers. Refs: WP3-I3; Backend #165, Frontend #63, RDM #240.
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