feat: Add time to startup/worker logs (#1872)

BREAKING CHANGE

Sends startup/worker logs to stderr to differentiate them from
access logs, which go to stdout

main/Main.hs

@@ -44,5 +44,4 @@ setBuffering = do
   -- output, the buffer overflows, a hFlush is issued or the handle is closed
   hSetBuffering stdout LineBuffering
   hSetBuffering stdin LineBuffering
-  -- NoBuffering: output is written immediately and never stored in the buffer
-  hSetBuffering stderr NoBuffering
+  hSetBuffering stderr LineBuffering