Enhance the Config file to include properties for Health Endpoint

[sezal98]

Add additional properties for processing Health Endpoint for datasource, runtime and entities.

Data API builder config

The standard allows for additive data, like DAB config data we could add.

{
  "status": "Healthy",
  "version": "1.2.10",
  "app-name": "dab_oss_1.2.10",
  "dab-configuration": {
    "http": true,
    "https": true,
    "rest": true,
    "graphql": true,
    "telemetry": true,
    "caching": true,
    "mode": "development",
    "dab-configs": [
      "/App/dab-config.json (mssql)"
    ],
    "dab-schemas": [
      "/App/schema.json"
    ]
  }
}

Configuration changes

{
  "runtime" : {
    "health" : {
      "enabled": true, (default: true)
      "cache-ttl": 5, (optional default: 5)
      "max-dop": 5, (optional default: 1)
      "roles": ["anonymous", "authenticated"] (optional default: *)
    }
  }
}
{
  "data-source" : {
    "health" : {
      "moniker": "sqlserver", (optional default: NULL) // not required, on purpose, most have just one
      "enabled": true, (default: true)
      "query": "SELECT TOP 1 1", (option)
      "threshold-ms": 100 (optional default: 10000)
    }
  }
}
{
  "<entity-name>": {
      "health": {
        "enabled": true, (default: true)
        "filter": "Id eq 1" (optional default: null),
        "first": 1 (optional default: 1),
        "threshold-ms": 100 (optional default: 10000)
      },
      ...
    },
  }
}

We want to allow the developer to influence how the checks work against the endpoint/entity.