Improve reliability of ennexOS (and maybe SEC) webscraper

[solderq35]

Relatively low priority as ennexOS only errors every few weeks at most, and SEC not at all for several months. Can't hurt though.

By moving most of the webscraper code into a try catch block + while loop as shown in PacificPower branch below, we can improve the reliability of EnnexOS and maybe SEC.

A key thing to note is that "await browser.newPage" is in the try catch block / while loop, which is ultimate failsafe. However, remember that clicking the cookies and logging in does not have to be re-done, so refer to PacificPower code for how to keep track of that with a flag.

https://github.com/OSU-Sustainability-Office/automated-jobs/blob/pacific-power/PacificPower/readPP.js#L72