[codex] Add runtime lifecycle recovery and live issue visibility (#4419)

packages/shared/src/validators/instance.ts

@@ -36,6 +36,7 @@ export const instanceExperimentalSettingsSchema = z.object({
   enableEnvironments: z.boolean().default(false),
   enableIsolatedWorkspaces: z.boolean().default(false),
   autoRestartDevServerWhenIdle: z.boolean().default(false),
+  enableIssueGraphLivenessAutoRecovery: z.boolean().default(false),
 }).strict();
 
 export const patchInstanceExperimentalSettingsSchema = instanceExperimentalSettingsSchema.partial();