fix: add real-time data disclaimer to welcome message (#304)

tests/timmy/test_welcome.py

@@ -0,0 +1,14 @@
+"""Tests for the welcome message module."""
+
+from timmy.welcome import WELCOME_MESSAGE
+
+
+class TestWelcomeMessage:
+    def test_welcome_message_contains_disclaimer(self):
+        assert "real-time" in WELCOME_MESSAGE.lower()
+
+    def test_welcome_message_mentions_weather(self):
+        assert "weather" in WELCOME_MESSAGE.lower()
+
+    def test_welcome_message_contains_greeting(self):
+        assert "Mission Control initialized" in WELCOME_MESSAGE