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GDS pipeline writes 0 ClusterConcept nodes on sparse graph despite communities existing
abce62b9-a0f2-4725-91af-4bd79942a29a
After running the nightly GDS pipeline on a fresh/sparse graph, community detection runs fine ("Labeled 38 nodes into 18 communities") but the cluster stage immediately reports "Wrote 0 ClusterConcept nodes". The graph viz shows no cluster connectivity at all.