[Hotfix] - Adding spotterConfidence to the rest endpoints

This is more of a hotfix  : 

- Adds `spotterConfidence` as a parameter to set up the spotter confidence.
- It leaves `confidence` as the parameter to set up the disambiguation confidence.
- Tested this manually
- One unit-test failed but it was failing before hand anyways

Working on a proper clean for module in the mean time, not sure if worth merging.