refactor(contracts): preserve named output schema types

Keep exact readonly schema maps and constrain contract factories to their owned keys. Verify named catalog lookups retain each schema type.

src/application/binary/AnalysisSnapshotCache.test.ts

@@ -924,7 +924,7 @@ it("does not replay pre-envelope call graphs under the revised workflow profile"
     }),
   ).toBeUndefined();
   expect(
-    enhancedOutputSchemas.get_call_graph?.safeParse({
+    enhancedOutputSchemas.get_call_graph.safeParse({
       normalized_result: oldResult,
     }).success,
   ).toBe(false);