Scala integration tests refactoring

[micossow]

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[Copilot]

Pull request overview

This PR refactors the Scala integration tests for ElasticMQ, reorganizing the test structure to improve maintainability and enable better multi-SDK testing. The changes primarily involve moving tests from a monolithic structure to a trait-based, modular organization.

Changes:

• Restructured integration tests into trait-based modules by functionality (QueueOperationsTests, MessageOperationsTests, FifoQueueTests, etc.)
• Reorganized client code from org.elasticmq.rest.sqs.client to org.elasticmq.rest.sqs.integration.client
• Added UUID-based postfix to queue actor names in QueueManagerActor to prevent name collision issues when recreating queues
• Created common test infrastructure (IntegrationTestsBase, SQSRestServerWithSdkV1Client, SQSRestServerWithSdkV2Client)
• Deleted old monolithic test files and replaced with modular test traits

Reviewed changes

Copilot reviewed 39 out of 39 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
core/src/main/scala/org/elasticmq/actor/QueueManagerActor.scala	Adds UUID postfix to actor names to fix queue recreation race condition
rest/rest-sqs-testing-amazon-java-sdk/src/test/scala/org/elasticmq/rest/sqs/integration/multisdk/*.scala	New trait-based test modules organized by functionality
rest/rest-sqs-testing-amazon-java-sdk/src/test/scala/org/elasticmq/rest/sqs/integration/common/*.scala	Common test infrastructure and base classes
rest/rest-sqs-testing-amazon-java-sdk/src/test/scala/org/elasticmq/rest/sqs/integration/client/*.scala	Reorganized client abstraction layer
rest/rest-sqs/src/test/scala/org/elasticmq/rest/stats/StatisticsDirectivesTest.scala	Added test for queue recreation scenario
rest/rest-sqs-testing-amazon-java-sdk/src/test/scala/org/elasticmq/rest/sqs/*.scala (deleted)	Removed old monolithic test files

Comments suppressed due to low confidence (3)

rest/rest-sqs-testing-amazon-java-sdk/src/test/scala/org/elasticmq/rest/sqs/integration/client/AwsSdkV2SqsClient.scala:505

• Debug logging statements should be removed or replaced with proper logging framework usage. These println statements for debugging are not appropriate for production code and may clutter output during test execution.
  rest/rest-sqs-testing-amazon-java-sdk/src/test/scala/org/elasticmq/rest/sqs/integration/common/IntegrationTestsBase.scala:72
• The method filterKeys is deprecated in Scala 2.13. Consider using filter with a tuple pattern instead: messageAttributes.filter { case (k, _) => requestedAttributes.contains(k) }

      messageAttributes.filterKeys(k => requestedAttributes.contains(k)).toMap

rest/rest-sqs-testing-amazon-java-sdk/src/test/scala/org/elasticmq/rest/sqs/integration/multisdk/MessageOperationsTests.scala:27

• This test has confusing and outdated comments that suggest uncertainty about test behavior. The comments indicate the test was modified based on previous failures but don't clearly state the current expected behavior. Either remove the outdated comments or clarify what the test is actually validating (e.g., "This test verifies that ElasticMQ rejects messages larger than 1MB even in strict mode").

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