Incomplete rollback compensation when account creation fails after balance creation

[ClaraTersi]

In CreateAccount use case, if metadata creation fails after balance was successfully created,
neither the balance nor the account are rolled back, leaving orphaned resources.

Current flow:

1. Create Account ✓
2. Create Balance ✓
3. Create Metadata ✗ → No compensation for steps 1 and 2

Expected: If step 3 fails, delete balance (step 2) and account (step 1).

File: components/onboarding/internal/services/command/create-account.go