fix(loader): make zarr shard shape a multiple of chunk shape for shor… - #4
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…t trajectories
Trajectories shorter than shard_size collapsed the shard dim to the trajectory
length (e.g. T=341), which is generally not a multiple of chunk_size (64), so
zarr v3 rejected the array ('chunk_shape not divisible by inner chunk_shape').
Round the leading shard dim down to a multiple of the leading chunk dim. Long
trajectories (T>=shard_size) are unaffected.
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…t trajectories
Trajectories shorter than shard_size collapsed the shard dim to the trajectory length (e.g. T=341), which is generally not a multiple of chunk_size (64), so zarr v3 rejected the array ('chunk_shape not divisible by inner chunk_shape'). Round the leading shard dim down to a multiple of the leading chunk dim. Long trajectories (T>=shard_size) are unaffected.