feat: group ODP/PDP data and add provinces with latest case endpoint

[ryanaidilp]

Summary

• Group ODP (Person Under Observation) and PDP (Patient Under Supervision) data into structured objects
• Add new endpoint to get provinces with their latest case data
• Improve API response structure for better data organization

Changes Made

1. ODP/PDP Data Grouping

• Created ObservationData and SupervisionData structs to group related fields
• Updated ProvinceDailyCases to use grouped ODP/PDP structures with keys:
  • daily.odp.active, daily.odp.finished, daily.odp.total
  • daily.pdp.active, daily.pdp.finished, daily.pdp.total
• Updated ProvinceCumulativeCases with similar grouped structure for cumulative data
• Maintained backward compatibility with data calculations

2. Provinces with Latest Case Data

• Added ProvinceWithLatestCase model to combine province info with latest case data
• Added GetProvincesWithLatestCase() service method
• Updated /api/v1/provinces endpoint to support ?include_latest_case=true query parameter
• When enabled, returns provinces with their latest COVID-19 case data

3. Testing

• Updated all test cases to use new grouped ODP/PDP structure
• Added mock service method for new endpoint
• All tests passing successfully

API Usage Examples

Get provinces with latest case data:

GET /api/v1/provinces

Province case response now has grouped ODP/PDP:

{
  "daily": {
    "positive": 100,
    "recovered": 80,
    "deceased": 5,
    "active": 15,
    "odp": {
      "active": 5,
      "finished": 10,
      "total": 15
    },
    "pdp": {
      "active": 5,
      "finished": 15,
      "total": 20
    }
  }
}

Test Results

• ✅ All unit tests passing
• ✅ All integration tests passing
• ✅ No regressions in existing functionality