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.span.test.ts

@@ -0,0 +1,43 @@
+import { describe, it, expect } from "vitest";
+import { RecordingTracer, RecordingLogger } from "@repo/core-testing/instrumentation";
+import { MockArticlesRepository } from "@/infrastructure/repositories/articles.repository.mock";
+
+// Mock repo also wraps in spans (R42); easier to assert without booting Payload.
+describe("MockArticlesRepository emits spans (R42)", () => {
+  it("getArticles emits one span with op='repository'", async () => {
+    const tracer = new RecordingTracer();
+    const logger = new RecordingLogger();
+    const repo = new MockArticlesRepository(tracer, logger);
+    await repo.getArticles({ limit: 10 });
+    expect(tracer.spans).toHaveLength(1);
+    expect(tracer.spans[0]).toMatchObject({
+      name: "articles.getArticles",
+      op: "repository",
+    });
+    expect(tracer.spans[0]!.attributes).toMatchObject({ limit: 10 });
+  });
+
+  it("createArticle emits a span with slug attribute", async () => {
+    const tracer = new RecordingTracer();
+    const repo = new MockArticlesRepository(tracer);
+    await repo.createArticle({
+      id: "a1",
+      title: "T",
+      slug: "t",
+      content: null,
+      status: "draft",
+      authorId: "u1",
+      createdAt: new Date(),
+      updatedAt: new Date(),
+    });
+    expect(tracer.findSpan("articles.createArticle")).toBeDefined();
+    expect(tracer.findSpan("articles.createArticle")!.attributes.slug).toBe("t");
+  });
+
+  it("getArticle records found=false for missing id", async () => {
+    const tracer = new RecordingTracer();
+    const repo = new MockArticlesRepository(tracer);
+    await repo.getArticle("missing");
+    expect(tracer.spans[0]!.attributes.found).toBe(false);
+  });
+});