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Issue: MSQ engine performs full segment scans for time-boundary queries

Issue: MSQ engine performs full segment scans for time-boundary queries: a task in LegoFlow-SWE (Harbor dataset). Observed behavior When running queries like SELECT MIN( time) FROM datasource or SELECT MAX( time) FROM datasource through the MSQ engine, the system reads all segments for the…

The task

**Observed behavior** When running queries like `SELECT MIN(__time) FROM datasource` or `SELECT MAX(__time) FROM datasource` through the MSQ engine, the system reads all segments for the datasource and executes a full GroupBy operation. This is extremely inefficient because time-boundary queries only need to inspect…

Part of Lego-X/LegoFlow-SWE.