refactor: expand runtime contracts and debt ratchets

mypy.ini

@@ -1,5 +1,5 @@
 [mypy]
-python_version = 3.12
+python_version = 3.14
 strict = True
 warn_unused_configs = True
 ignore_missing_imports = True
@@ -16,6 +16,7 @@ files =
     app/runtime/event/contracts.py,
     app/runtime/extensions/module/contracts.py,
     app/application/outbox.py,
+    app/application/configuration.py,
     app/application/chain/context.py,
     app/application/chain/durable_events.py,
     app/application/subscription/delete.py,
@@ -23,5 +24,6 @@ files =
     app/application/subscription/mutation.py,
     app/startup/context.py,
     app/startup/chain_events.py,
+    app/startup/download_failure.py,
     app/api/context.py,
     app/api/dependencies/subscription.py