fix(memory-monitor): lower fail-fast thresholds and humanize diagnostic messages #4686

Job	Run time
Get Changes	4s
Check: destination-motherduck	2m 59s
Check: source-intercom	2m 58s
Skipped Check: source-google-drive	5s
Check: source-shopify	12m 59s
Check: source-hardcoded-records	2m 45s
Check: source-pokeapi	2m 6s
	23m 56s

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