feat(workspaces): status and list use cases

getWorkspaceStatus returns persisted { id, status } only (runner-driven
transitions arrive in story 07); listWorkspaces returns the
credential-free workspace array with a strict void input (optional on
the tRPC procedure so clients can call without args). Repository gains
listWorkspaces on interface, mock, and Payload impl; the contract suite
covers listing incl. the never-returns-credentials guarantee.
Controller span+capture wrapping is extracted into a shared
bindWorkspacesController helper used by both binders, trimming the
bind-production/bind-dev-seed clone family fallow was flagging.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016j8z4VHjedXDTjEDNg7qHK

packages/workspaces/src/application/use-cases/get-workspace-status.use-case.ts

@@ -0,0 +1,44 @@
+import { z } from "zod";
+
+import { WorkspaceNotFoundError } from "../../entities/errors/workspace";
+import { workspaceSchema } from "../../entities/models/workspace";
+import type { IWorkspaceRepository } from "../repositories/workspace.repository.interface";
+
+// ── Input ────────────────────────────────────────────────────────────────
+export const getWorkspaceStatusInputSchema = z
+  .object({
+    id: z.string().min(1),
+  })
+  .strict();
+export type GetWorkspaceStatusInput = z.infer<
+  typeof getWorkspaceStatusInputSchema
+>;
+
+// ── Output ───────────────────────────────────────────────────────────────
+// Persisted state only in this story — runner-driven transitions (story 07)
+// extend the status enum, not this shape.
+export const getWorkspaceStatusOutputSchema = workspaceSchema.pick({
+  id: true,
+  status: true,
+});
+export type GetWorkspaceStatusOutput = z.infer<
+  typeof getWorkspaceStatusOutputSchema
+>;
+
+// ── Use case ─────────────────────────────────────────────────────────────
+export type IGetWorkspaceStatusUseCase = ReturnType<
+  typeof getWorkspaceStatusUseCase
+>;
+
+export const getWorkspaceStatusUseCase =
+  (workspaceRepository: IWorkspaceRepository) =>
+  async (input: GetWorkspaceStatusInput): Promise<GetWorkspaceStatusOutput> => {
+    const workspace = await workspaceRepository.getWorkspace(input.id);
+    if (!workspace) {
+      throw new WorkspaceNotFoundError(`Workspace not found: ${input.id}`);
+    }
+    return getWorkspaceStatusOutputSchema.parse({
+      id: workspace.id,
+      status: workspace.status,
+    });
+  };