feat: elaborate TODOs #771

Job	Run time
test-server	21s
test-fake-database	22s
framework (random, no-auth)	2m 31s
core (random, all-features)	37m 32s
framework (controlled, no-auth)	3m 21s
core (random, single-seller)	38m 13s
core (random, no-payment-reconciliation)	37m 53s
core (random, no-auth)	40m 31s
core (random, no-tax-calculation)	39m 14s
core (random, prepayment-always-required)	34m 15s
core (random, facilityuse-has-slots)	37m 30s
core (controlled, all-features)	36m 38s
core (controlled, single-seller)	35m 11s
core (controlled, no-payment-reconciliation)	36m 12s
core (controlled, no-auth)	36m 30s
core (controlled, no-tax-calculation)	34m 39s
core (controlled, prepayment-always-required)	34m 39s
core (controlled, facilityuse-has-slots)	35m 46s
publish-server	0s
publish-fake-database	0s
deploy-reference-implementation	0s
	8h 41m 18s

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