CompanyResolveMatch

The company payload on a resolve result.

Purpose-built rather than reusing CompanyMinimalSerializer, which has no
ticker -- unusable for a ticker-reconciliation endpoint. Every field here
is already published on /api/companies/, so this adds no new public surface.

{
    "id": 0,
    "name": "string",
    "ticker": "string",
    "isins": [
        "string"
    ],
    "lei": "string",
    "country_code": "string",
    "listing_status": "string"
}