fix(cashier): prevent duplicate cashier lookup crash + add missing migrations

- DenominationBreakdownWriter: add ORDER BY mc.id DESC LIMIT 1 to all cashier
  lookup queries so multiple cashier records per staff do not crash queryForObject
- CashReportApiResource: same LIMIT 1 fix for cashier-day-status and position endpoints
- 0311: fix m_client and m_savings_account NOT NULL columns (created_by, last_modified_by,
  created_on_utc, last_modified_on_utc, cif_number, is_lien_allowed, etc.)
- 0312: create CASHIER role if missing + grant all 34 cashier permissions (incl FD/RD)
- 0313: add missing m_cash_exchange columns (cashier_id, is_reversed, reversed_by,
  reversed_at, reverse_reason, customer_id_proof)
- 0314: unique constraint on m_cashiers.staff_id to prevent duplicate allocations
- application.properties: restore local postgres password after merge
- ExecuteOverdueAndCurrentStandingInstructionsTest: fix constructor call (5 args)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

fineract-provider/src/main/resources/application.properties

@@ -407,7 +407,7 @@ server.tomcat.mbeanregistry.enabled=${FINERACT_SERVER_TOMCAT_MBEANREGISTRY_ENABL
 spring.datasource.hikari.driverClassName=${FINERACT_HIKARI_DRIVER_SOURCE_CLASS_NAME:org.postgresql.Driver}
 spring.datasource.hikari.jdbcUrl=${FINERACT_HIKARI_JDBC_URL:jdbc:postgresql://localhost:5432/fineract_tenants}
 spring.datasource.hikari.username=${FINERACT_HIKARI_USERNAME:postgres}
-spring.datasource.hikari.password=${FINERACT_HIKARI_PASSWORD:root}
+spring.datasource.hikari.password=${FINERACT_HIKARI_PASSWORD:313863}
 spring.datasource.hikari.minimumIdle=${FINERACT_HIKARI_MINIMUM_IDLE:3}
 spring.datasource.hikari.maximumPoolSize=${FINERACT_HIKARI_MAXIMUM_POOL_SIZE:10}
 spring.datasource.hikari.idleTimeout=${FINERACT_HIKARI_IDLE_TIMEOUT:60000}