@copilot Fix all the issues you found during review, all in one go. You are allowed to commit to the PR.

@copilot Fix all the issues you found during review, all in one go. You are allowed to commit to the PR.

Fixed all four issues in commit fix(ci): restore Maven server config, fix artifact upload expressions, sanitize env inputs:

1. Restored actions/setup-java server config (server-id, server-username, server-password) in both build_baseline and build_sut jobs, along with the job-level MVN_USERNAME/MVN_PASSWORD env vars needed for Maven to authenticate against the timefold-solver-enterprise Artifactory repository.

2. Fixed actions/upload-artifact name: field — replaced unexpanded shell $EXAMPLE/$SANITIZED_* with ${{ matrix.example }} and ${{ env.SANITIZED_BASELINE }}/${{ env.SANITIZED_BRANCH }} which GitHub Actions evaluates correctly in with: inputs.

3. Fixed actions/upload-artifact path: fields — replaced shell $BASELINE_DIR/$SUT_DIR with ${{ env.BASELINE_DIR }}/${{ env.SUT_DIR }}.

4. Sanitized CR/LF in $GITHUB_ENV writes — added tr -d '\r\n' to strip newlines from user-provided inputs before writing to $GITHUB_ENV, and consolidated all four writes into a single heredoc block.