feat: Mastodon Post Composition and Publishing

tests/test_config.py

@@ -142,7 +142,7 @@ def test_load_config_applies_optional_defaults(env_setup, monkeypatch) -> None:
     monkeypatch.delenv("TZ", raising=False)
 
     config = load_config()
-    assert config.throwback_prefix == "Throwback:"
+    assert config.throwback_prefix == "Heute vor 10 Jahren:"
     assert config.max_retries == 3
     assert config.tz == "Europe/Berlin"
     assert config.visibility == "public"