Add regression tests for the Medium findings resolved in this series:
- AbCipDataType_maps_large_integer_types (theory: LInt→Int64, ULInt→UInt64,
UDInt→UInt32) and Read_UDInt_tag_returns_uint_value_not_negative_wrapped_int
cover Driver.AbCip-004.
- Structure_parent_tag_is_not_readable_after_member_fan_out,
InitializeAsync_throws_on_duplicate_tag_name, and
InitializeAsync_throws_when_member_name_collides_with_independent_tag
cover Driver.AbCip-005.
- Read_failure_evicts_runtime_so_next_read_creates_fresh_handle covers
Driver.AbCip-010.
AbCipDriverTests.AbCipDataType_maps_atomics_to_driver_types extended with
LInt/ULInt/UDInt assertions.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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