Results 3 issues of fanis

ref. https://github.com/nikosT/Gisola/discussions/53 Hello, I made the necessary changes to set NUM_OF_TIME_SAMPLES from 8192 points to 1024. I did some testing and inversions are indeed faster: ``` 8192.log INFO Function 'calculateInversions'...

This is a minor fix to make the time and cross section correlation plots cleaner. Before ![image](https://github.com/user-attachments/assets/77ea3d92-3491-4c4b-ad8b-cee25a53fe42) After ![image](https://github.com/user-attachments/assets/fad9e77e-abee-4d2b-9138-ebc7a268ba96)

This PR introduces changes to read the Keyinv (dev/iso) parameter directly from the Gisola configuration file. The default value of Keyinv is set to 2 (deviatoric) when it is not...