Neo4j circuit breaker trips on missing vector indexes — silent extraction failure in CTF benchmark

After wiping Docker volumes for a clean CTF benchmark, the Neo4j knowledge graph extraction pipeline silently fails: all reports show "extracted 0 nodes" and the graph stays empty. The pg-boss extraction queue processes reports but every write fails. The Neo4j circuit breaker opens after 5 consecutive failures, then stays open permanently (half-open probes keep failing), blocking all graph operations. The API container logs show the root cause buried deep: Failed to invoke procedure db.index.vector.queryNodes: There is no such vector schema index: cluster_embedding.