fix: fail safe on missing workspace revisions

backend/test/workspaces-schema.test.ts

@@ -1,3 +1,5 @@
+import { readFileSync } from "node:fs";
+import { resolve } from "node:path";
 import { expect, test } from "vitest";
 import * as workspaceSchema from "../src/workspaces/schema.js";
 import {
@@ -95,6 +97,28 @@ test("accepts only the schema v3 internal qdrant semantic shape", () => {
   });
 });
 
+test("committed example descriptors parse as exact schema v3 workspaces", () => {
+  const example = readFileSync(resolve(process.cwd(), "../deploy/workspaces/example.yaml"), "utf8");
+  const psdExample = readFileSync(resolve(process.cwd(), "../deploy/workspaces/psd.yaml.example"), "utf8");
+
+  expect(() => parseWorkspaceYaml(example)).not.toThrow();
+  expect(() => parseWorkspaceYaml(psdExample)).not.toThrow();
+  expect(parseWorkspaceYaml(example)).toMatchObject({
+    workspace: { schema_version: 3 },
+    semantic_index: {
+      vector_store: { engine: "qdrant", distance: "cosine", dimensions: 1024 },
+      embedding: { provider: "ollama_internal", model: "qwen3-embedding:0.6b", dimensions: 1024 },
+    },
+  });
+  expect(parseWorkspaceYaml(psdExample)).toMatchObject({
+    workspace: { schema_version: 3 },
+    semantic_index: {
+      vector_store: { engine: "qdrant", distance: "cosine", dimensions: 1024 },
+      embedding: { provider: "ollama_internal", model: "qwen3-embedding:0.6b", dimensions: 1024 },
+    },
+  });
+});
+
 test("rejects pgvector semantic stores in schema v3", () => {
   expect(() => parseWorkspaceYaml(validYaml.replace("engine: qdrant", "engine: pgvector")))
     .toThrow(/qdrant|pgvector/i);