Use fastjsonschema's detailed_exceptions=False

We don't use fastjsonschema's exception info, falling back to jsonschema for that. Not using the info is faster.
Possible because https://github.com/horejsek/python-fastjsonschema/issues/187 was completed.

I did not at present do any speed/memory checks, but the diff is quite promising :-)

ingest/management/commands/fetch_event_schema_json.py

@@ -37,7 +37,7 @@ The source of this file is: %s
 
         # use_formats=False for "uint64", see https://github.com/horejsek/python-fastjsonschema/issues/108
         # use_default=False to avoid fastjsonschema adding default values to the data it validates (bwegh)
-        code = fastjsonschema.compile_to_code(schema, use_formats=False, use_default=False)
+        code = fastjsonschema.compile_to_code(schema, use_formats=False, use_default=False, detailed_exceptions=False)
 
         with open(settings.BASE_DIR / "bugsink/event_schema.py", "w") as f:
             f.write("""# This file is generated by fetch_event_schema_json.py

requirements.txt

@@ -13,5 +13,5 @@ whitenoise
 requests
 monofy==1.1.*
 user_agents
-fastjsonschema
+fastjsonschema>=2.21.0
 verbose_csrf_middleware