Direct download URL for generated reports (Reporting feature).

Is your feature request related to a problem? Please describe.

In ThingsBoard PE v4.2.1.1, after a report is generated using the Reporting feature, there is no direct online download link available for the generated report (for example, a PDF file).

Currently, reports can only be downloaded manually from the Reporting → Reports tab using the Download button in the UI. However, there is no direct URL that can be shared or reused to download the same report file.

This becomes a problem when sending reports via email or external systems, especially in cases where the PDF size exceeds email attachment limits. Without a direct download link, users have no alternative way to access the report.

Describe the solution you'd like
Provide a direct download link (URL) for each generated report (e.g., PDF) that allows users to download the report online.

The link should correspond to the same report shown in the Reporting → Reports tab and perform the same action as the existing Download button, but in a sharable URL form.

Additional context
Having a direct download link would allow users to:

• Share report access via email or messaging instead of attaching large files
• Handle cases where email attachment size limits are exceeded
• Integrate report delivery more flexibly into existing workflows

If this functionality does not currently exist, please consider this as a feature request.