Water meter leak indicator moves once in a while
Max, with that small of a “leak” I would not worry about it but I may try an experiment where you turn your water heater off for several hours and see if it is any different this test may be more accurate if some hot water was used after the water heater was turned off so the cooling down or cycling of the water heater might be eliminated as the cause but .0001 cult is a very small amount of water. And probably not worry about as it is not a consistent leak and may be due to water heater temp cycling.