fix(parquet): make column reader cleanup idempotent#924
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Column chunk cleanup retained both the current page and page reader after Close, so repeated cleanup could release or close the same resources twice. Page-reader replacement also discarded close errors and installed the replacement anyway.
This change detaches resources before cleanup, makes Close idempotent, returns and retains replacement cleanup errors, and uses the checked replacement path from the Arrow reader before continuing to seek or read.
Tests: