fix: allow GET on incidents/cases to include participants & other fields

[aaronherman]

A user reported that include[]=participants hasn't been working for a few months. We currently are using the CasePagination for get_cases but I think we should use CaseExpandedPagination to support all include[] options.

[ghost]

Does that resolve the issue? If so, would Incidents have a similar issue?

@router.get("", summary="Retrieve a list of incidents.")
def get_incidents(
    common: CommonParameters,
    include: List[str] = Query([], alias="include[]"),
    expand: bool = Query(default=False),
):
    """Retrieves a list of incidents."""
    pagination = search_filter_sort_paginate(model="Incident", **common)

    if expand:
        return json.loads(IncidentExpandedPagination(**pagination).json())

    if include:
        # only allow two levels for now
        include_sets = create_pydantic_include(include)

        include_fields = {
            "items": {"__all__": include_sets},
            "itemsPerPage": ...,
            "page": ...,
            "total": ...,
        }
        return json.loads(IncidentPagination(**pagination).json(include=include_fields))
    return json.loads(IncidentPagination(**pagination).json())

[ghost]

Regardless, I do think we want this change.

[aaronherman]

Good catch - I validated that incidents also don't support all fields and have updated it to use IncidentExpandedPagination