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* fix: re-scan stream-backed tables in recursive CTEs A recursive CTE re-executes its recursive term on every iteration, but DfTableProviderAdapter hands StreamScanAdapter a single-use stream built at planning time. The second iteration failed with "Stream already exhausted" for every table served through DataSource::get_stream — information_schema, pg_catalog, the computed entity-graph tables and numbers. Keep that stream for the first execution and open a new one over the same scan request for later executions. Closes #9037 Signed-off-by: Dennis Zhuang <killme2008@gmail.com> * refactor: drop redundant binding in stream factory Signed-off-by: Dennis Zhuang <killme2008@gmail.com> --------- Signed-off-by: Dennis Zhuang <killme2008@gmail.com>