fix(protocol-contracts): add start() in OperatorRewarder (H-01) (#1717) #918

Job	Run time
check-changes	7s
re-tag-db-migration-image / prepare-image-tags	6s
re-tag-zkproof-worker-image / prepare-image-tags	5s
re-tag-tfhe-worker-image / prepare-image-tags	5s
re-tag-host-listener-image / prepare-image-tags	4s
re-tag-tx-sender-image / prepare-image-tags	4s
build-host-listener	0s
build-gw-listener	0s
build-db-migration	0s
re-tag-sns-worker-image / prepare-image-tags	6s
re-tag-gw-listener-image / prepare-image-tags	5s
build-tfhe-worker	0s
build-sns-worker	0s
build-zkproof-worker	0s
build-tx-sender	0s
re-tag-tx-sender-image / re-tag-image	15s
re-tag-host-listener-image / re-tag-image	15s
re-tag-zkproof-worker-image / re-tag-image	18s
re-tag-gw-listener-image / re-tag-image	12s
re-tag-tfhe-worker-image / re-tag-image	10s
re-tag-db-migration-image / re-tag-image	14s
re-tag-sns-worker-image / re-tag-image	10s
	2m 16s

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