[ImalkaPerera]

Description

JIRA: https://issues.apache.org/jira/browse/FINERACT-3078

Replaces the native SQL in CurrencyReadPlatformServiceImpl.retrieveCurrency(String) with a type-safe QueryDSL query. Behaviour is unchanged: same columns, same where code = ? and order by name, and an unknown code still throws EmptyResultDataAccessException.

Changes

• CurrencyReadPlatformServiceImpl: retrieveCurrency now uses SQLQueryFactory with the generated QMCurrency type.
• CurrencyDataProjection (new): MappingProjection that maps the selected columns to CurrencyData, following the pattern of FinancialActivityAccountProjection.
• fineract-core/dependencies.gradle: fineract-core now depends on fineract-querydsl so the generated Q-types are available there.
• OrganisationMonetaryConfiguration: passes SQLQueryFactory to the service constructor.

CurrencyRowMapper and JdbcTemplate stay in the class until FINERACT-3076 and FINERACT-3077 convert the two remaining queries (retrieveAllowedCurrencies, retrieveAllPlatformCurrencies).

Testing

• New CurrencyReadPlatformServiceImplTest runs the query through a real SQLQueryFactory on a mocked JDBC connection (PostgreSQL and MySQL templates). It asserts the generated SQL, the bound parameter, the result mapping, nullable columns and the not-found exception.
• The service was also run against PostgreSQL 18.3 and MariaDB 12.2 for all 164 seeded currencies plus an unknown code; results matched the previous SQL.
• fineract-core tests pass (591), and fineract-provider compiles with the constructor change.

Checklist

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