Fix p6spy-spring-boot-starter 2.0.0 test compatibility

[Copilot]

The p6spy-spring-boot-starter 2.0.0 upgrade introduced a BeanDefinitionOverrideException in delivery module tests due to duplicate autoconfiguration of oracleUcpPoolDataSourceMetadataProvider conflicting with Spring Boot's JDBC metadata providers.

Changes

Added delivery/test-resources/application.properties with test-specific configuration:

• Bean conflict resolution: Enable spring.main.allow-bean-definition-overriding=true to permit the duplicate bean definitions from p6spy 2.0.0
• Schema initialization: Configure spring.jpa.hibernate.ddl-auto=update and spring.jpa.defer-datasource-initialization=true to ensure Hibernate creates tables before data.sql executes
• Hibernate Search: Use in-memory local-heap backend for tests instead of filesystem-based indexing

The fix is scoped to tests only - production configuration remains unchanged.

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