possibility to Annotate the sensor charts/logs

[accel]

It is nice to look at the sensor graphical charts in Domoticz, but sometimes I like to put some notes in this graphic for later reference.
For example weather data like barometric pressure in combination the wind speeds that day or why a swich was automatically triggered (Event or someting else) etc, etc.

[JonCC4]

I believe this feature would be an invaluable addition.

Being able to add a flag to specific or all "time axis" graphs to identify an event for impact comparison and associate a title or notes to that flag would greatly aid reviewing impact of tracked event across graphs.

For example, I have data from smart energy meter, evohome, weather, pipe temps and boiler stats feeding into Domoticz. Being able to record a date time event of "changing the boiler heating loop temperature" which would then leave a flag on selected logs would aid review of impact on energy use, temps around house, boiler cycling etc.

Currently I manually keep a log on paper of changes, but means when jumping between graph reports I have to manually find that time event where as this feature would give me a visual marker to select.