feat(backend/kernel): honour _use_arrow_native_complex_types via kernel's complex_types_as_json post-processor #2898

Job	Run time
check-types (3.11)	1m 44s
check-linting (3.10)	1m 35s
check-linting (3.13)	2m 47s
check-types (3.14)	18m 27s
check-linting (3.12)	2m 46s
check-types (3.9)	3m 8s
check-linting (3.9)	1m 47s
check-linting (3.11)	2m 44s
check-types (3.10)	1m 52s
check-types (3.12)	1m 50s
check-linting (3.14)	17m 0s
Unit Tests (Python 3.12, default deps)	3m 41s
check-types (3.13)	2m 7s
Unit Tests + PyArrow (Python 3.14, min deps)	19m 38s
Unit Tests (Python 3.14, default deps)	18m 51s
Unit Tests (Python 3.13, default deps)	3m 28s
Unit Tests (Python 3.10, min deps)	3m 59s
Unit Tests + PyArrow (Python 3.10, default deps)	4m 26s
Unit Tests + PyArrow (Python 3.11, default deps)	4m 19s
Unit Tests + PyArrow (Python 3.9, min deps)	4m 41s
Unit Tests (Python 3.11, min deps)	4m 14s
Unit Tests (Python 3.11, default deps)	3m 36s
Unit Tests + PyArrow (Python 3.14, default deps)	19m 2s
Unit Tests + PyArrow (Python 3.13, default deps)	4m 20s
Unit Tests + PyArrow (Python 3.9, default deps)	4m 35s
Unit Tests (Python 3.9, default deps)	3m 43s
Unit Tests (Python 3.9, min deps)	3m 58s
Unit Tests (Python 3.10, default deps)	3m 34s
Unit Tests + PyArrow (Python 3.10, min deps)	4m 34s
Unit Tests + PyArrow (Python 3.12, default deps)	4m 18s
Unit Tests (Python 3.14, min deps)	18m 22s
Unit Tests + PyArrow (Python 3.11, min deps)	4m 40s
	3h 19m 46s

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