Improve speed of data formatting for parallel coordinates graph

[mohammedri]

Currently, the frontend does some heavy processing (O(n^2)) to convert the job data from the backend to the format that the chart library expects. This leads to long load times when landing on the page.

We should either improve the algorithm in the frontend that does the formatting, store and send the data from the backend properly formatted, or investigate trying to fit our data into the external chart library.

CC: @hyun20005