Implement a history-based matching algorythm

The bot will attempt to keep producing groups with entirely unique matches based on the full history of matches until it can't. It'll then step forward and ignore a week of history and try again, ignoring more history until no history is left

.github/workflows/pytest.yml

@@ -23,4 +23,4 @@ jobs:
         flake8 --max-line-length 120 $(git ls-files '*.py')
     - name: Run tests with pytest
       run: |
-        pytest
+        pytest --timeout=60