Properly ignore redundant interval starts.

Dependencies

• [2] KNSI575V Cleanup of EventLog types.
• [3] SCXG6TJW Make log reduction safer in presence of overlapping events.
• [4] NEDDHXUK Reformat via stylish-haskell
• [*] NVOCQVAS Initial failing tests.

Change contents

• replacement in lib/Aftok/TimeLog.hs at line 151
  [2.2286]→[2.2286:2388](∅→∅)
  − combine (e1 @ (StartWork _)) (e2 @ (StartWork _)) = Left $ min e1 e2 -- ignore redundant starts
  [2.2286]

  [2.2388]
  + combine (e1 @ (StartWork _)) (e2 @ (StartWork _)) = Left $ max e1 e2 -- ignore redundant starts