feat(billing): Convert referral bonuses from monthly recurring to one-time credits, and bump them from 250 -> 500 #5696

Job	Run time
build-and-check	2m 34s
test-integration-packages/billing	1m 1s
test-.agents	37s
test-packages/agent-runtime	43s
test-integration-web	48s
test-sdk	49s
test-integration-cli	41s
test-integration-packages/agent-runtime	40s
test-common	48s
test-integration-sdk	41s
test-integration-common	41s
test-web	43s
test-packages/billing	52s
test-cli	56s
test-packages/internal	45s
test-integration-packages/internal	1m 2s
	14m 21s

Provide feedback