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Javier de la TorreandJavier de la Torre
593cfee85b
Table and partition statistics are Puffin files that the table metadata lists in its statistics entries; orphan cleanup keeps them (#11651), and its test places one at metadata/stats-1.puffin. The table bucket layout rule accepted only *.stats among them, so an engine that names a statistics file *.puffin had the upload refused with 403 and could not write statistics at all. The metadata patterns now admit a *.puffin file directly under metadata/, with the same safe-character rule as the other catch-all patterns. Nothing else widens: a Puffin file in a subdirectory of metadata/, with a trailing extension, or outside <namespace>/<table>/ is still refused. Test: the new metadata/*.puffin cases in TestIcebergLayoutValidator_AcceptsRealWorldManifestNames and TestTableBucketFileValidator_PuffinStatisticsOnlyInTableMetadata fail on master ("invalid metadata file format") and pass with the change; the rejected cases pass on both. Co-authored-by: Javier de la Torre <jatorre@lakehousebox.com>