fix: use int8 for SWC compartment type to handle type=-1 - #27
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Some SWC files use compartment type -1, which overflows np.uint8 and raises an OverflowError. Since read_zips silently swallows exceptions, affected zips were dropped entirely, causing the graph to load fewer components than expected. Changing the dtype to int8 (range -128 to 127) accommodates -1 and all standard SWC compartment codes (1–7). Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Some SWC files use compartment type -1, which overflows np.uint8 and raises an OverflowError. Since read_zips silently swallows exceptions, affected zips were dropped entirely, causing the graph to load fewer components than expected.
Changing the dtype to int8 (range -128 to 127) accommodates -1 and all standard SWC compartment codes (1–7).