[Question] What is the utility of aggregate?

[amadeu01]

I look at the code and tests. However, I couldn't figure out the objective of having `aggregate property.
The only test I found that mention that property was the description one.

swift-metrics/Tests/MetricsTests/CoreMetricsTests.swift

Lines 395 to 410 in 99a068b

	func testDescriptions() throws {
	let metrics = TestMetrics()
	MetricsSystem.bootstrapInternal(metrics)
	let timer = Timer(label: "hello.timer")
	XCTAssertEqual("\(timer)", "Timer(hello.timer, dimensions: [])")
	let counter = Counter(label: "hello.counter")
	XCTAssertEqual("\(counter)", "Counter(hello.counter, dimensions: [])")
	let gauge = Gauge(label: "hello.gauge")
	XCTAssertEqual("\(gauge)", "Gauge(hello.gauge, dimensions: [], aggregate: false)")
	let recorder = Recorder(label: "hello.recorder")
	XCTAssertEqual("\(recorder)", "Recorder(hello.recorder, dimensions: [], aggregate: true)")
	}

[kukushechkin]

aggregate flag is a hint for the backend whether it makes sense to aggregate metric value into buckets. We've added a better explanation throughout the code: #223.