Detection sentinel for an extend_to_all dimension. A per-dimension
tolerance at or above this value means "visible across every value of
this dimension" — the dimension is skipped entirely during slicing.
Set below EXTEND_TO_ALL_TOLERANCE (1e10) so the flag is detected
even after float round-trips, while staying unreachable for real data.
Detection sentinel for an
extend_to_alldimension. A per-dimension tolerance at or above this value means "visible across every value of this dimension" — the dimension is skipped entirely during slicing. Set belowEXTEND_TO_ALL_TOLERANCE(1e10) so the flag is detected even after float round-trips, while staying unreachable for real data.