[New Feature] make timestamped data work with time series gui without sample rate estimation

[qku]

Feature Description

• remove the requirement of a sample rate estimate for data instreamers with timestamp sample timing
• make time series logic and gui independent of sample rate estimate if data has timestamp sample timing

Related Problem

Even if a data instreamer provides data with timestamp timing, a sample rate estimation is still required for the time series logic and gui to work. If the actual rate of incoming data changes during a stream, problems occur (incorrect sliding of data in the time series gui, very slow gui) because the logic and gui currrently still rely heavily on the sample rate estimate.

Considered Alternatives

Right now I am trying to find ways to improve the sample rate estimate of the wavemeter (PR #79). However, this is nearly impossible to get right: if e.g. a channel is activated on the switch while a stream is running, the overall sample rate decreases drastically.

Additional Context

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Contact Details

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[qku]

Let's keep in mind that if we should test the time series toolchain with large time windows/large amounts of data to ensure that everything is efficient enough. Redrawing entire plots frequently is very resource intensive and should be avoided.