Use a single worker

.github/haiku.rag.yaml

@@ -13,6 +13,10 @@ processing:
 ingester:
   queue:
     path: ingester.db
+  workers:
+    # One worker: the runner's single CPU-bound Ollama serialises embeds, so
+    # concurrent workers thrash rather than parallelise.
+    worker_count: 1
   sources:
     - type: fs
       id: docs

.github/workflows/build-rag-db.yml

@@ -7,7 +7,7 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
-    timeout-minutes: 60
+    timeout-minutes: 90
     steps:
       - uses: actions/checkout@v4
       - uses: astral-sh/setup-uv@v4