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Both tests extend AbstractPostgresIT and inherit the Postgres jdbcTemplate, which they were using to query ClickHouse-resident tables (executions, processor_executions, route_diagrams). Now: - DiagramLinkingIT reads diagramContentHash off the execution-detail REST response (and tolerates JSON null by normalising to empty string, which matches how the ingestion service stamps un-linked executions). - IngestionSchemaIT asserts the reconstructed processor tree through the execution-detail endpoint (covers both flattening on write and buildTree on read) and reads processor bodies via the processor-snapshot endpoint rather than raw processor_executions rows. Both tests now use the ExecutionChunk envelope on POST /data/executions. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>