CDD-3342 - Dual category chart download api endpoint

[tushortz]

Description

This PR includes the following:

• dual category chart download interface/api
• cms bug fix due to use of wrong second_category name

Fixes #CDD-3342

---

Type of change

Please select the options that are relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Tech debt item (this is focused solely on addressing any relevant technical debt)

---

Checklist:

• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests at the right levels to prove my change is effective
• I have added screenshots or screen grabs where appropriate
• I have added docstrings in the correct style (google)

[tushortz]

Payload

{
  "file_format": "json",
  "x_axis": "age",
	"chart_type": "stacked_bar",
  "y_axis": "metric",
  "confidence_intervals": true,
  "primary_field_values": [
    "00-01",
    "01-04",
    "05-09",
    "05-11",
    "05-14",
    "10-14"
  ],
  "static_fields": {
    "topic": "Lead",
    "metric": "lead_headline_ratesByAgeSex",
    "geography": "England",
    "geography_type": "Nation",
    "sex": "all",
    "age": "all",
    "stratum": "default",
    "date_from": "2020-05-21",
    "date_to": "2026-05-21"
  },
  "secondary_category": "sex",
  "segments": [
		{
			"secondary_field_value": "f",
			"colour": "COLOUR_1_DARK_BLUE",
			"label": "Females"
		},
		{
			"secondary_field_value": "m",
			"colour": "COLOUR_1_DARK_BLUE",
			"label": "Males"
		}
  ]
}

[tushortz]

[
	{
		"age": "00-01",
		"theme": "climate_and_environment",
		"sub_theme": "chemical_exposure",
		"topic": "Lead",
		"geography_type": "Nation",
		"geography": "England",
		"metric": "lead_headline_ratesByAgeSex",
		"stratum": "default",
		"period_start": "2023-01-01 00:00:00",
		"period_end": "2023-12-31 00:00:00",
		"m": "5.5000",
		"f": "6.0000"
	},
	{
		"age": "01-04",
		"theme": "climate_and_environment",
		"sub_theme": "chemical_exposure",
		"topic": "Lead",
		"geography_type": "Nation",
		"geography": "England",
		"metric": "lead_headline_ratesByAgeSex",
		"stratum": "default",
		"period_start": "2023-01-01 00:00:00",
		"period_end": "2023-12-31 00:00:00",
		"m": "22.3000",
		"f": "13.5000"
	},
        ...
]

[sonarqubecloud]

Quality Gate failed

Failed conditions
3.9% Duplication on New Code (required ≤ 3%)

See analysis details on SonarQube Cloud

[tushortz]

please remove

[tushortz]

the payload is different for dual categroy charts so the examples below in the docstring is not applicable here

[tushortz]

could you remove the print above and below

[tushortz]

@aidan these are my observations that needs fixing so far

• Fix SonarQube warnings (Majority are because you have print statements you forgot to remove
• Fix test coverage. Currently 99.97 ⁠
• Code error. (this is because DownloadsView is now renamed as SingleCategoryDownloadsView. so you can just remove it from the import in metrics/api/urls_construction.py
• Timeseries serializer should not require primary_field_values. See DualCategoryChartSerializer.validate() for example
• I receive response for other endpoints like downloads and charts but not for tables. Could you have a look please?