feat(blog): wire instrumentation — repo spans + use-case/controller withSpan + logger capture

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

packages/blog/src/infrastructure/repositories/articles.repository.test.ts

@@ -62,7 +62,10 @@ function buildPayloadStub() {
     findByID: vi.fn(
       async ({ id }: { collection: string; id: string; overrideAccess?: boolean }) => {
         const doc = store.get(String(id));
-        if (!doc) throw new Error(`Not found: ${id}`);
+        if (!doc) {
+          const err = Object.assign(new Error(`Not found: ${id}`), { status: 404 });
+          throw err;
+        }
         return doc;
       },
     ),
@@ -77,7 +80,10 @@ function buildPayloadStub() {
         overrideAccess?: boolean;
       }) => {
         const existing = store.get(String(id));
-        if (!existing) throw new Error(`Not found: ${id}`);
+        if (!existing) {
+          const err = Object.assign(new Error(`Not found: ${id}`), { status: 404 });
+          throw err;
+        }
         const updated = { ...existing, ...data };
         store.set(String(id), updated);
         return updated;