POST /api/v1/data/executions is owned by ChunkIngestionController (the
legacy ExecutionController path is @ConditionalOnMissingBean(ChunkAccumulator)
and never binds). The old RouteExecution-shaped seed was silently parsed
as an empty ExecutionChunk and nothing landed in ClickHouse.
Rewrote the seed as a single final ExecutionChunk with chunkSeq=0 /
final=true and a flat processors[] carrying seq + parentSeq to preserve
the 3-level tree (DetailService.buildTree reconstructs the nested shape
for the API response). Execution-id lookup now goes through the search
REST API filtered by correlationId, per the no-raw-SQL preference.
Template for the other Cluster B ITs.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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