Proposal to amend the attributes for the airnow-http adapter

[caparker]

This is the only provider that ends up with an attribute array in the metadata for the sensor node. I believe that its conflating provider and source (first element is provider, second is source) but only the first one is making it into the system. I propose that we simplify it to an object and come up with appropriate keys for mapping to data in the db.

openaq-fetch/src/adapters/airnow-http.js

Line 115 in 6778a10

attribution: [{name: 'US EPA AirNow', url: 'http://www.airnow.gov/'}, {name: m[8].trim()}],

Here is an example of some data coming in

"attribution":[{"name":"US EPA AirNow","url":"http://www.airnow.gov/"},{"name":"Canada-Prince Edward Island1"}]

Here is the hungary file

"attribution":[{"name":"Hungary National Meteorological Service","url":"https://legszennyezettseg.met.hu/"}]

Likely need to change this as well to make sure we dont create another one with an array

openaq-fetch/src/lib/measurement-schema.json

Lines 32 to 49 in 6778a10

	"attribution": {
	"type": "array",
	"items": {
	"type": "object",
	"required": ["name"],
	"additionalProperties": false,
	"properties": {
	"name": {
	"type": "string",
	"minLength": 1
	},
	"url": {
	"type": "string",
	"pattern": "^(https?:\/\/)?([\\da-z\\.-]+)\\.([a-z\\.]{2,6})([\/\\w \\.-]*)*\/?"
	}
	}
	}
	},