Follow-on story to
MODFISTO-37 - we need to ensure that we're providing a currency code when calling the storage module to create fiscal years. The currency field is needed for a couple different reasons including for creation of ledger-fiscal-year records
The system currency should be used - obtained from mod-configuration
If a system currency is not configured, or mod-configuration is inaccessible, e.g. not enabled, etc. the call should fail with an appropriate error response/code.
- currency is provided when creating FYs
- unit tests are updated
- API tests are updated