Allow SDI of 6 characters (#4406)

Author: patrick91

backend/billing/validation.py

@@ -20,7 +20,7 @@
 def validate_sdi_code(sdi_code: str) -> bool:
     sdi_code = sdi_code.upper()
 
-    if len(sdi_code) != 7:
+    if len(sdi_code) not in [6, 7]:
         raise SdiCodeIncorrectLengthError()
 
     if not sdi_code.isalnum():

pretix/Dockerfile

@@ -6,7 +6,7 @@ RUN pip install boto3==1.35.14 \
     django-storages==1.14.4 \
     pretix-plugin-extended-api==0.1.14 \
     pretix-plugin-attendance-certificate==0.1.11 \
-    pretix-fattura-elettronica==0.2.15 \
+    pretix-fattura-elettronica==0.2.16 \
     pretix-plugin-advanced-stats==1.0.0
 
 RUN cd /pretix/src && DATABASE_HOST=demo make staticfiles