Closes annotation detection is inacurate in high resolutions

[eh-am]

Compared to a higher resolution (~1 hour):

Most likely due to an inaccuracy from flot's pointOffset function

Testing data

❯ curl -X POST -d '{ "appName": "pyroscope.server.cpu", "content": "test", "timestamp": 1663182385 }' localhost:4040/api/annotations

http://localhost:4040/?query=pyroscope.server.cpu%7B%7D&from=1663182345&until=1663182410