ci: expand CI workflow

.github/workflows/checks.yaml

@@ -18,6 +18,8 @@ jobs:
       - name: Install requirements
         run: pip install -r requirements_dev.txt
       - name: Lint with pylint
-        run: pylint tests/tasks/*
+        run: pylint tests/tasks/* middleware/*
       - name: Lint with ruff
-        run: ruff check tests/tasks/*
+        run: ruff check tests/tasks/* middleware/*
+      - name: Type checking with mypy
+        run: mypy middleware

.gitignore

@@ -173,4 +173,6 @@ poetry.toml
 # LSP config files
 pyrightconfig.json
 
-# End of https://www.toptal.com/developers/gitignore/api/python
+# End of https://www.toptal.com/developers/gitignore/api/python
+
+outputs/

requirements_dev.txt

@@ -1,4 +1,6 @@
-requests
+crypt4gh~=1.7
+mypy
 pytest
 pylint
+requests
 ruff