Fixed issue with logging suffix in user agent being duplicated

[normj]

Issue #, if available:
#340

Description of changes:
In the recent release we updated to the SDK's new API for appending information to the logging API. There was an issue with the change that since logging library reuses the request object how the user agent string was being built it would duplicate the logging suffix on every request. This would work till the user agent it a size limit and then requests would start failing.

The fix is to add a check to make sure the suffix hasn't already been added before adding the logging suffix.

I tests this by first recreating with the user's code in the GitHub issue and the after the change confirming the user agent suffix is only added once.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[normj]

This change wasn't relevant to the issue, just fixing a typo in the private method name.

[Copilot]

Pull Request Overview

Fixes an issue where the logging suffix in the user agent string was being duplicated on every request, eventually causing requests to fail when the user agent exceeded size limits.

• Fixed typo in method name from ServiceClienExceptionEvent to ServiceClientExceptionEvent
• Added duplicate check before adding user agent component to prevent multiple additions of the same suffix
• Updated changelog configuration for patch releases across all logging packages

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
src/AWS.Logger.Core/Core/AWSLoggerCore.cs	Fixed method name typo and added logic to prevent duplicate user agent suffix additions
.autover/changes/52c0e0b8-9e89-458c-8ee1-07433da667d9.json	Added changelog entries for patch releases across all logging packages

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