GX-TXT RC discharge tutorial — expected numerical result

Using the supplied three input Datasets and the default 200-point common grid:

Common interval: 0.08 .. 9.70 s
Fitted V0: approximately 5.00505 V
Fitted tau: approximately 2.19961 s
Consensus RMSE: approximately 0.009793 V
Published Dataset ID: tutorial.rc_discharge_fit

Small numerical differences can occur because the authoritative result is the one produced by the GX-TXT public APIs in the running framework.
