Draft: Ingestion of SVOM ECLAIRS notices into LLAI workflow

This MR will ingest SVOM GRBs alerts detected by ECLAIRS instrument.

gwcelery/tasks/external_skymaps.py

@@ -45,7 +45,8 @@ NOTICE_TYPE_DICT = {
         '111': 'FERMI_GBM_FLT_POS',
         '112': 'FERMI_GBM_GND_POS',
         '115': 'FERMI_GBM_FINAL_POS',
-        '131': 'FERMI_GBM_SUBTHRESHOLD'
+        '131': 'FERMI_GBM_SUBTHRESHOLD',
+        '576': 'SVOM_ECLAIRS_ALERT'
 }