[Misc] Performance improvements, SMIRKS Coverage, Minor Bugfixes (#132)

Bump Python Version to 3.12
Make use of "epauth" optional
Cache `srs` property of rules to speed up apply
Adjust view names for use of `reverse()`
Fix Views for Scenario Attachments
Added Simply Compare View/Template to identify differences between rdkit and ambit
Make migrations consistent with tests + compare
Fixes #76
Set default year for Scenario Modal
Fix html tags for package description
Added Tests for Pathway / Rule
Added remove stereo for apply

Co-authored-by: Tim Lorsbach <tim@lorsba.ch>
Reviewed-on: enviPath/enviPy#132

epdb/models.py

@@ -1101,7 +1101,7 @@ class ParallelRule(Rule):
     def _url(self):
         return '{}/parallel-rule/{}'.format(self.package.url, self.uuid)
 
-    @property
+    @cached_property
     def srs(self) -> QuerySet:
         return self.simple_rules.all()