Count and rank projects by OPEN issues only in Projects view

[Copilot]

Projects view was counting all issues when populating issueCount, which caused closed issues to affect both the displayed count and repository ordering. This update makes the count and sort logic use OPEN issues only.

• Backend count semantics

  • Updated GitProjectsController to compute issueCount from issues where state == "open" (case-insensitive).
  • Kept existing sorting behavior (issueCount desc), now based on open-only counts.

• Behavioral coverage

  • Added integration coverage in GitProjectsControllerIntegrationTest to validate:
    • closed issues are excluded from issueCount
    • repositories are ordered by open-issue count

• Representative change

  private int countOpenIssues(List<RepositoryIssueDto> issues) {
      if (issues == null) {
          return 0;
      }
      return (int) issues.stream()
              .filter(Objects::nonNull)
              .map(RepositoryIssueDto::getState)
              .filter(Objects::nonNull)
              .filter("open"::equalsIgnoreCase)
              .count();
  }