feat(core-shared): add Analyzed brand and isAnalyzed type guard

Adds the `Analyzed<F>` phantom-type brand to brands.ts and the
`isAnalyzed` type-guard to brand-runtime.ts, mirroring the existing
Instrumented/Captured/Audited pattern. Exports both from the
conformance index so Story 04 (wireUseCase) can key off the brand
without a circular dep.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

packages/core-shared/src/conformance/index.ts

@@ -1,4 +1,4 @@
-export type { Instrumented, Captured } from "./brands";
+export type { Instrumented, Captured, Analyzed } from "./brands";
 export type { FeatureManifest, UseCaseManifest } from "./define-feature";
 export { defineFeature } from "./define-feature";
 export type {
@@ -22,6 +22,7 @@ export {
   isInstrumented,
   isCaptured,
   isAudited,
+  isAnalyzed,
 } from "./brand-runtime";
 export { ConformanceError } from "./conformance-error";
 export { assertFeatureConformance } from "./assert-bindings";