test: reduce brittle assertions and test-only runtime paths (#9289)

* test: focus assertions on behavioral evidence

Prune redundant and wording-coupled checks while retaining diagnostic, parser, recovery, and cleanup coverage.

* refactor: remove test-only wrappers and duplicate checks

Exercise production operations through test fixtures, remove unused adapters, and keep managed-member uncertainty guidance under its existing owner.

* test: focus process validation on diagnostic facts

* refactor: remove test-only runtime helpers

Move semantic evidence fixture setup out of runtime and remove unused Windows settle recovery helpers while checking configured defaults independently.

* test: focus artifact diagnostics on format facts

* test: verify retained cleanup guidance delivery

src/application/il2cpp/Il2cppMetadataService.test.ts

@@ -171,7 +171,6 @@ it("preserves source Evidence and requested output choices when publication fail
     path: "/output/seeds.tsv",
     base: "0x2000",
   });
-  expect(result.ok).toBe(false);
   if (result.ok) throw new Error("Failed publication accepted");
   expect(result.error).toBe(failure);
   expect(result.error.partialObservation).toMatchObject({
@@ -213,7 +212,6 @@ it("retains a published seed receipt if cancellation arrives after the atomic wr
     { path: receipt.path },
     { signal: controller.signal },
   );
-  expect(result.ok).toBe(false);
   if (result.ok) throw new Error("Cancellation ignored");
   expect(result.error).toBeInstanceOf(AnalysisCancelledError);
   expect(result.error.cause).toBe(reason);