[Chore]: Address outstanding SonarCloud issues (excluding monster/empty class rules) #419
Description
What
Review and remediate all open and confirmed SonarCloud issues (except for 'monster class' and 'empty class' rules) in the repository. Update code quality, resolve bugs, and fix maintainability/code-smell problems as flagged by SonarCloud, grouping related changes where possible.
Why
To enhance code health, ensure maintainability, and conform with best practices by addressing all but the explicitly excluded SonarCloud issues. This keeps technical debt manageable and supports long-term project sustainability.
Notes
Do not address any 'monster class' or 'empty class' SonarCloud issues. Please reference the SonarCloud Project Issues for details on which issues to remediate. Make sure to add or update tests, verify code formatting (./mvnw com.spotify.fmt:fmt-maven-plugin:format), and ensure the build passes with ./mvnw clean verify. For contribution guidelines, see the repository README or documentation.