Add agent artifact upload workflow

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

server/src/__tests__/agent-skills-routes.test.ts

@@ -699,6 +699,13 @@ describe.sequential("agent skill routes", () => {
         }),
         expect.any(Object),
       );
+      expect(mockAgentInstructionsService.materializeManagedBundle).toHaveBeenCalledWith(
+        expect.any(Object),
+        expect.objectContaining({
+          "AGENTS.md": expect.stringContaining("scripts/paperclip-upload-artifact.sh"),
+        }),
+        expect.any(Object),
+      );
     });
   });