feat: #862 analytics dashboard district enhancement

[ianliuwk1019]

ref: #862
This PR implements the enhancements to the Analytics Dashboard described at ticket #862: add new grouped bar chart to display public comments counts by district and response codes.

Backend:

• Added support in the backend service for endpoint (getCommentCountByDistrict) to fetch comment counts aggregated by district and response codes.
• Adjust TypeORM query for retrieving FOM public comment data.
• Updated API response DTOs and OpenAPI (swagger) definitions so the endpoint is reflected in the generated TypeScript client for the new chart.

Frontend:

• Extended the analytics data service to request to backend and expose district-level analytics data.
• Modified the dashboard component to:
  • Render a “Public comments by district and category” chart, showing counts of comments grouped by district and response category.
  • Add filters for selecting specific districts (e.g., “All districts” or a specific one).
  • Integrate the new dataset with the new charts.
  • Added chart configuration definitions and colors for the new district view.

---

Thanks for the PR!

Deployments, as required, will be available below:

• api
• admin
• public

Please create PRs in draft mode. Mark as ready to enable:

• Analysis Workflow

After merge, new images are deployed in:

• Merge Workflow

---

Thanks for the PR!

Deployments, as required, will be available below:

• api
• admin
• public

Please create PRs in draft mode. Mark as ready to enable:

• Analysis Workflow

After merge, new images are deployed in:

• Merge Workflow