Add checkpointer to cog-runtime #1074

Job	Run time
Check Go	24s
Go Code Linting	40s
SmokeTest: Test Go Test Harness with legacy Cog	1m 20s
check-stubs	24s
Build & verify python package	27s
Test Set UID for procedure mode	1m 51s
Test Go	1m 26s
Test Set UID cleanup in one-shot mode	1m 56s
Check with Python 3.9	20s
Check with Python 3.10	19s
Test with Python 3.9	47s
Check with Python 3.12	18s
Check with Python 3.13	17s
Check with Python 3.11	17s
Test with Python 3.10	48s
Test with Python 3.11	48s
Test with Python 3.13	48s
Test with Python 3.12	42s
Release	0s
	13m 52s

Provide feedback