Database monitoring memory leak fixed; SQS pathway extraction corrected

Bug Fixes

• database monitoring: Resolved a memory leak that grew with query volume when DD_DBM_PROPAGATION_MODE was set to full, service, or dynamic_service.

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• botocore: Fixes a bug in Data Streams Monitoring where the pathway context of an SQS message was not extracted when the message body was valid JSON, silently breaking the data stream for non-SNS messages with a JSON payload. The _datadog message attribute is now read from the top-level SQS MessageAttributes first, and the message body is only parsed for SNS-to-SQS notifications.

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• Django: This fix resolves an issue where async function-based middleware attributes, such as process_exception, were not preserved, causing Django to skip exception handlers under ASGI.