Edition wait time statistics

What does this mr do?

• 2 new graphs on the edition statistics page.
  • Request frequencies across labs
  • Wait and processing time across labs

Screenshots

Does this MR meet the acceptance criteria?

• I have added a changelog entry to reflect the significant changes I made.
• Tests were created to test the feature.
• I have updated the documentation accordingly.
• I adhere to the style guide.

Closes #587 (closed) #592 (closed)