style(sports): variable annotations instead of type comments

pyflakes (Codacy) does not read "# type:" comments, so it flagged the
Optional and List imports they use as unused (F401). Inline annotations say
the same to mypy. The drift-report normaliser, which the stage 4 parity test
shares, now treats "x: T = v" as "x = v" -- it already dropped annotations
elsewhere -- so the core copies still match the plugins' plain assignments.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

scripts/sports_drift_report.py

@@ -140,6 +140,14 @@ class _Canonical(ast.NodeTransformer):
         node.annotation = None
         return node
 
+    def visit_AnnAssign(self, node):
+        # ``x: T = v`` is ``x = v``; a bare ``x: T`` does nothing at runtime.
+        self.generic_visit(node)
+        if node.value is None:
+            return None
+        return ast.copy_location(
+            ast.Assign(targets=[node.target], value=node.value), node)
+
 
 class _Folded(_Canonical):
     """Canonical, plus sport names folded out of identifiers and strings."""