Skip missing worktree attachment objects

Co-Authored-By: Paperclip <noreply@paperclip.ing>

cli/src/__tests__/worktree.test.ts

@@ -6,6 +6,7 @@ import { afterEach, describe, expect, it, vi } from "vitest";
 import {
   copyGitHooksToWorktreeGitDir,
   copySeededSecretsKey,
+  readSourceAttachmentBody,
   rebindWorkspaceCwd,
   resolveSourceConfigPath,
   resolveGitWorktreeAddArgs,
@@ -195,6 +196,19 @@ describe("worktree helpers", () => {
     expect(formatShellExports(env)).toContain("export PAPERCLIP_INSTANCE_ID='feature-worktree-support'");
   });
 
+  it("treats missing source attachment objects as a non-fatal skip", async () => {
+    const missingErr = Object.assign(new Error("missing"), { code: "ENOENT" });
+    await expect(
+      readSourceAttachmentBody(
+        {
+          getObject: vi.fn().mockRejectedValue(missingErr),
+        },
+        "company-1",
+        "company-1/issues/issue-1/missing.png",
+      ),
+    ).resolves.toBeNull();
+  });
+
   it("generates vivid worktree colors as hex", () => {
     expect(generateWorktreeColor()).toMatch(/^#[0-9a-f]{6}$/);
   });