Refine types and enable typechecking in cursor.py #5222

Job	Run time
Check linting	44s
Check dependency (3.8)	22s
Check dependency (3.9)	20s
Check dependency (3.10)	14s
Check dependency (3.11)	15s
Check dependency (3.12)	18s
No Arrow Extension Test linux-3.8-aws	24s
Old Driver Test linux-3.8-aws	9m 41s
Build manylinux_x86_64-py3.8	1m 11s
Build manylinux_x86_64-py3.9	1m 14s
Build manylinux_x86_64-py3.10	1m 12s
Build manylinux_x86_64-py3.11	1m 9s
Build manylinux_x86_64-py3.12	1m 11s
Build manylinux_aarch64-py3.8	1m 13s
Build manylinux_aarch64-py3.9	1m 14s
Build manylinux_aarch64-py3.10	1m 13s
Build manylinux_aarch64-py3.11	57s
Build manylinux_aarch64-py3.12	58s
Build win_amd64-py3.8	58s
Build win_amd64-py3.9	58s
Build win_amd64-py3.10	58s
Build win_amd64-py3.11	59s
Build win_amd64-py3.12	58s
Build macosx_x86_64-py3.8	1s
Build macosx_x86_64-py3.9	1s
Build macosx_x86_64-py3.10	1s
Build macosx_x86_64-py3.11	1s
Build macosx_x86_64-py3.12	1s
Build macosx_arm64-py3.8	23s
Build macosx_arm64-py3.9	29s
Build macosx_arm64-py3.10	29s
Build macosx_arm64-py3.11	37s
Build macosx_arm64-py3.12	29s
Test Lambda linux-${{ matrix.python-version }}-${{ matrix.cloud-provider }}	0s
Test FIPS linux-3.8-${{ matrix.cloud-provider }}	0s
Test ${{ matrix.os.download_name }}-${{ matrix.python-version }}-${{ matrix.cloud-provider }}	0s
Combine coverage	17s
	31m 30s

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