Add Eligibility_Address_Key__c field (postcode:streetAddress format) to Case records
for eligibility check requests. Salesforce Flow will use this field to detect duplicate
requests for the same address within a time period.
Changes:
- Add eligibilityAddressKey to CreateCaseParams and CASE_FIELDS mapping
- Add streetAddress param to EligibilityCheckCaseParams for passing from callers
- Add createAddressKey() helper in WorkflowCaseManager to generate the key
- Update raw.types.ts schema with new field
- Note in internet-eligibility.service.ts that basic flow skips duplicate detection