Making contracts `memory-safe` #373

Job	Run time
verify (verifyOwners.sh)	17m 7s
verify (verifySafe.sh)	4m 48s
verify (verifyModules.sh)	15m 38s
verify (verifyNativeTokenRefund.sh)	4m 21s
verify (verifySignatures.sh)	4m 33s
	46m 27s

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