Add GitHub webhook receiver

tests/test_dispatcher.py

@@ -0,0 +1,32 @@
+from __future__ import annotations
+
+import unittest
+from types import SimpleNamespace
+from unittest.mock import AsyncMock
+
+from app.commands import CommandDispatcher, CommandRegistry
+
+
+class CommandDispatcherTests(unittest.IsolatedAsyncioTestCase):
+    async def test_unknown_owner_command_is_silent(self) -> None:
+        dispatcher = CommandDispatcher(CommandRegistry())
+        message = SimpleNamespace(
+            text=".missing",
+            from_user=SimpleNamespace(id=123),
+            reply_text=AsyncMock(),
+        )
+        account = SimpleNamespace(me=SimpleNamespace(id=123))
+
+        handled = await dispatcher.dispatch(
+            client=SimpleNamespace(),
+            message=message,
+            manager=SimpleNamespace(),
+            account=account,
+        )
+
+        self.assertTrue(handled)
+        message.reply_text.assert_not_awaited()
+
+
+if __name__ == "__main__":
+    unittest.main()