Losing precision when querying Points whenever nanoseconds in timestamps matter.

[jcracine]

As the title said, I realised that when I query points the current system using std::chrono makes it that we lose the nanoseconds precision in the timestamp, making it possible to have to Points object with the same ID. I know that the nanoseconds are optional with InfluxDB, but I was wondering if it would be faisible to have it.