add @DirtiesContext annotation to FlywayMigrationIT for context management

Author: while1618

backend/spring-boot/src/test/java/org/bugzkit/api/shared/integration/FlywayMigrationIT.java

@@ -3,8 +3,10 @@
 import org.bugzkit.api.shared.config.DatabaseContainers;
 import org.junit.jupiter.api.Test;
 import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.annotation.DirtiesContext;
 import org.springframework.test.context.ActiveProfiles;
 
+@DirtiesContext
 @ActiveProfiles("test")
 @SpringBootTest
 class FlywayMigrationIT extends DatabaseContainers {