build: create dedicated workflow for genai tests

Moves genai testing from the shared custard-ci workflow to a dedicated workflow file. This ensures tests only run when files in genai/ change, and allows for better isolation.

Author: holtskinner

.github/config/nodejs.jsonc

@@ -70,6 +70,7 @@
     "functions/http/uploadFile", // no tests exist
     "functions/log", // parent directory
     "functions/pubsub", // parent directory
+    "genai", // tested in .github/workflows/genai.yaml
     "memorystore/redis", // parent directory
     "recaptcha_enterprise/demosite/app", // no tests exist
 

.github/workflows/genai.yaml

@@ -0,0 +1,32 @@
+name: genai
+on:
+  push:
+    branches:
+    - main
+    paths:
+    - 'genai/**'
+    - '.github/workflows/genai.yaml'
+    - '.github/workflows/test.yaml'
+  pull_request:
+    types:
+    - opened
+    - reopened
+    - synchronize
+    - labeled
+    paths:
+    - 'genai/**'
+    - '.github/workflows/genai.yaml'
+    - '.github/workflows/test.yaml'
+  schedule:
+  - cron: '0 0 * * 0'
+
+jobs:
+  test:
+    permissions:
+      contents: 'read'
+      id-token: 'write'
+    if: github.event.action != 'labeled' || github.event.label.name == 'actions:force-run'
+    uses: ./.github/workflows/test.yaml
+    with:
+      name: 'genai'
+      path: 'genai'