add source files requested as prod stream status

scipost_django/production/constants.py

@@ -4,6 +4,7 @@ __license__ = "AGPL v3"
 
 PRODUCTION_STREAM_INITIATED = "initiated"
 PRODUCTION_STREAM_COMPLETED = "completed"
+PROOFS_SOURCE_REQUESTED = "source_requested"
 PROOFS_TASKED = "tasked"
 PROOFS_PRODUCED = "produced"
 PROOFS_CHECKED = "checked"
@@ -15,6 +16,7 @@ PROOFS_PUBLISHED = "published"
 PROOFS_CITED = "cited"
 PRODUCTION_STREAM_STATUS = (
     (PRODUCTION_STREAM_INITIATED, "New Stream started"),
+    (PROOFS_SOURCE_REQUESTED, "Source files requested"),
     (PROOFS_TASKED, "Supervisor tasked officer with proofs production"),
     (PROOFS_PRODUCED, "Proofs have been produced"),
     (PROOFS_CHECKED, "Proofs have been checked by Supervisor"),