feat: add diagnostic logging, deadlock prevention, and stdout buffering for concurrent reads #4497

Job	Run time
Get Changes	6s
Skipped Check: source-google-drive	3s
Check: source-pokeapi	2m 0s
Check: source-intercom	5m 21s
Check: destination-motherduck	3m 8s
Check: source-hardcoded-records	2m 43s
Check: source-shopify	5h 34m 28s
	5h 47m 49s

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