Arrow implicit null bitmap is not propagated during run time

Desired implementation to solve this could be to have a seperate MMIO register to signal there is an implicit null bitmap (e.g. all data is valid).
This bit should end up in the command stream of a user core to a columnreader/writer.

The issue mentions adding an MMIO register to signal an implicit null bitmap in Arrow data. Look at the command stream handling between user core and columnreader/writer components. Start by examining the VHDL code for MMIO registers and the command stream structure. Determine where the null bitmap status is currently propagated and where to insert the new bit. Testing would involve simulating the updated data path with Arrow data that has implicit nulls.

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