fix: rum instrumentation

[fkakatie]

No description provided.

[aem-code-sync]

Hello, I'm Franklin Bot and I will run some test suites that validate the page speed.
In case there are problems, just click the checkbox below to rerun the respective action.

• Re-run PSI Checks

[trieloff]

I'd also add to loadLazy:

  sampleRUM('lazy');
  sampleRUM.observe(main.querySelectorAll('div[data-block-name]'));
  sampleRUM.observe(main.querySelectorAll('picture > img'));

from https://github.com/adobe/helix-project-boilerplate/blob/31c70e12527604005cf80a4d3830e1b71e04fbe9/scripts/scripts.js#L103-L105

and to loadDelayed()/delayed.js:

// Core Web Vitals RUM collection
sampleRUM('cwv');

from https://github.com/adobe/helix-project-boilerplate/blob/10c37787d5f8450d470cc13cc2af183f58bbb02f/scripts/delayed.js#L4-L5

And to 404.html:

  <script type="module">
    import { sampleRUM } from '/assets/scripts/scripts.js';

    window.addEventListener('load', () => {
      sampleRUM('404', { source: document.referrer, target: window.location.href });
    });
  </script>

from https://github.com/adobe/helix-project-boilerplate/blob/10c37787d5f8450d470cc13cc2af183f58bbb02f/404.html#L13-L31

[trieloff]

I like to keep this just below the sampleRUM definition, so that the RUM code isn't as scattered.