fix(eve): scope forget, persist capture idempotency, and fail closed

Review findings: delete was not partitioned by scope.key, capture
replay after restart could double-write, and Mem0 errors were swallowed
as empty recall.

Co-authored-by: Cursor <cursoragent@cursor.com>

integrations/eve/tests/errors.test.ts

@@ -0,0 +1,38 @@
+import { describe, expect, it, vi } from "vitest";
+import {
+  errorMessage,
+  isNotFoundError,
+  isSetupError,
+  logProviderError,
+} from "../src/errors.js";
+
+describe("errors", () => {
+  it("classifies setup and not-found errors", () => {
+    expect(isSetupError(new Error("Mem0 API key cannot be empty"))).toBe(true);
+    expect(isSetupError(Object.assign(new Error("denied"), { name: "AuthenticationError" }))).toBe(
+      true,
+    );
+    expect(isSetupError(new Error("mem0 down"))).toBe(false);
+    expect(isNotFoundError(new Error("Memory not found"))).toBe(true);
+    expect(isNotFoundError(new Error("HTTP 404"))).toBe(true);
+    expect(errorMessage("x")).toBe("Unknown Mem0 error");
+  });
+
+  it("logs the original error object", () => {
+    const error = vi.spyOn(console, "error").mockImplementation(() => {});
+    const failure = Object.assign(new Error("HTTP 401"), {
+      name: "AuthenticationError",
+    });
+    try {
+      logProviderError("recall failed", failure, { sessionId: "sess_1" });
+      expect(error).toHaveBeenCalledWith("[@mem0/eve] recall failed", {
+        error: failure,
+        name: "AuthenticationError",
+        message: "HTTP 401",
+        sessionId: "sess_1",
+      });
+    } finally {
+      error.mockRestore();
+    }
+  });
+});