Add better WooCommerce tagging

[pmgarman]

Is your enhancement related to a problem? Please describe.

Sort of - I'm trying to inspect requests to wc-ajax, and they aren't being tagged separately

Designs

In the code below, we could add within the DOING_AJAX a check for WC_DOING_AJAX and if set, make the request wc-ajax? Then in other areas ensuring the different wc ajax requests are grouped as transactions.

			// Set Ajax/CLI/CRON/Gearman/Web
			if ( defined( 'DOING_AJAX' ) && DOING_AJAX ) {
				$req_type = 'ajax';
			} elseif ( defined( 'DOING_CRON' ) && DOING_CRON ) {
				$req_type = 'cron';
			} elseif ( defined( 'WP_CLI' ) && WP_CLI ) {
				$req_type = 'cli';
			} elseif ( defined( 'WP_GEARS' ) && WP_GEARS ) {
				$req_type = 'gearman';
			} else {
				$req_type = 'web';
			}

Describe alternatives you've considered

No response

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