Reduce warn logs noise

[milanmajchrak]

Problem description

There is a lot of noise from this warn log No such configuration property: *.
There are at least 10 logs per a minute like that.

Analysis

(Write here, if there is needed describe some specific problem. Erase it, when it is not needed.)

Problems

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Manual Testing (if applicable)

• Added to testing scenarios

Copilot review

• Requested review from Copilot

[Copilot]

Pull request overview

This PR reduces REST API log noise by changing how 4xx client errors are logged in DSpaceApiExceptionControllerAdvice, specifically downgrading HTTP 404 responses from WARN to DEBUG.

Changes:

• Refactored 4xx logging into a new logClientError(...) helper.
• Logged 404 (NOT_FOUND) at DEBUG while keeping other 4xx responses at WARN.

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[Copilot]

Pull request overview

Reduces REST API WARN log noise by making 404 (NOT_FOUND) responses optionally log at DEBUG instead, controlled via a new runtime configuration property.

Changes:

• Add logging.server.debug-404 configuration option (default enabled in dspace.cfg) to downgrade 404 logging to DEBUG.
• Refactor 4xx logging in DSpaceApiExceptionControllerAdvice into a shared helper which applies the 404 rule.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
dspace/config/dspace.cfg	Introduces logging.server.debug-404 with explanatory comments and default true.
dspace-server-webapp/src/main/java/org/dspace/app/rest/exception/DSpaceApiExceptionControllerAdvice.java	Adds config constant + helper methods to log 404 at DEBUG and other 4xx at WARN; routes existing WARN logging through the helper.

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