Bugfix: Only allow rank==0 to clean up old checkpoints (#2558)

kmn1024

2025-06-25 443bc09c11f3cf89ffc573aab2021f0c933aa5b3

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vinte    2
trinta    3
quarenta    4
cinquenta    5
sessenta    6
setenta    7
oitenta    8
noventa    9