mesh-build-go's composer test builds the node-engine's composer from what lies beside, with nothing fetched; with mesh-sdk
and the node-engine alone, its zero-version requirements on mesh-contracts (and mesh-delivery, mesh-networking) were looked
up on the network and the group's fourth try failed. The quick fix, chosen: the catalogue's beside rule names them. The
thorough fix, left: besideFor derives a built sibling's siblings from its go.mod's zero-version requirements.
Claude-Session: https://claude.ai/code/session_01NcbgfFSnn24M3GcqttoU7i
jschoubben
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