[Jungfrau][Dark] Feat: Skip first ntrains

Description

This MR is addressing the request made by Marcin, https://git.xfel.eu/calibration/pycalibration/-/issues/122, to have a parameter in Jungfrau Darks to exclude the first number of trains from dark constants' processing. His analysis lead that the first trains of Jungfrau are a transient period that when we exclude we produce better dark constants

How Has This Been Tested?

Relevant Documents (optional)

Types of changes

• New feature (non-breaking change which adds functionality)

Checklist:

Reviewers

@mramilli @schmidtp @kluyvert

webservice/update_config.py

@@ -87,6 +87,9 @@ TIMEPIX_CONFIGURATIONS = {
 JUNGFRAU_CONFIGURATIONS = {
     'correct': {
         'roi-definitions': {'type': list, 'element_type': int},
+    },
+    'dark': {
+        'skip-ntrains': {'type': int},
     }
 }
 
@@ -128,6 +131,7 @@ AVAILABLE_DETECTORS = {
     "SQS_EXP_TIMEPIX": [TIMEPIX_CONFIGURATIONS, TIMEPIX_DATA_MAPPING],
     "FXE_XAD_JF1M": [JUNGFRAU_CONFIGURATIONS, JUNGFRAU_DATA_MAPPING],
     "FXE_XAD_JF500K": [JUNGFRAU_CONFIGURATIONS, JUNGFRAU_DATA_MAPPING],
+    "SPB_IRDA_JF4M": [JUNGFRAU_CONFIGURATIONS, JUNGFRAU_DATA_MAPPING]
 }