fix(billing): add missing subscription fields and audit logging to upgrade flow #4735

Job	Run time
Build / Build	8m 12s
Test Agent Local / test_agent_local	38m 12s
Test API / API Test Local	7m 17s
Test Packages / Test ./internal/billing	1m 34s
Test Packages / Test ./internal/encryption	1m 22s
Test Packages / Test ./internal/hash	1m 19s
Test Packages / Test ./internal/id	1m 15s
Test Packages / Test ./internal/keys	1m 18s
Test Packages / Test ./internal/resend	1m 14s
Test Packages / Test ./packages/api	1m 24s
Test Packages / Test ./packages/cache	1m 32s
Test Packages / Test ./packages/hono	1m 25s
Test Packages / Test ./packages/nextjs	1m 24s
Test Packages / Test ./packages/rbac	1m 32s
	1h 9m 0s

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