Reimport archived sessions into the current workspace (#2123)

* fix(sessions): reimport archived sessions in their workspace

Archived agent records were treated as active imports, hiding their provider sessions permanently. Workspace-originated imports also discarded their workspace identity and created a duplicate workspace.

* fix(sessions): validate archived session restores

Restore archived imports under their existing Paseo agent identity, reject stale workspace ownership, and gate workspace targeting when the host cannot honor it.

* fix(sessions): roll back failed archived imports

If provider resume or history hydration fails, close any partial runtime, re-archive the provider session, and restore the original stored agent record.

* fix(sessions): validate restored import ownership

* fix(sessions): serialize concurrent restores

* fix(sessions): harden archived import recovery

* fix(sessions): validate archived import placement

* refactor(sessions): centralize provider session imports

Keep workspace placement rollback and stored-agent activation behind their existing owners so Session remains the wire boundary.

packages/client/src/daemon-client.ts

@@ -159,6 +159,7 @@ const PROJECT_GITHUB_CLONE_TIMEOUT_MS = 5 * 60 * 1000;
 
 interface ImportAgentInputBase {
   cwd?: string;
+  workspaceId?: string;
   labels?: Record<string, string>;
 }
 
@@ -2524,6 +2525,7 @@ export class DaemonClient {
         ? { providerId: input.providerId, providerHandleId: input.providerHandleId }
         : { provider: input.provider, sessionId: input.sessionId }),
       ...(input.cwd ? { cwd: input.cwd } : {}),
+      ...(input.workspaceId ? { workspaceId: input.workspaceId } : {}),
       ...(input.labels && Object.keys(input.labels).length > 0 ? { labels: input.labels } : {}),
     });