chore: update model manifest

[github-actions]

Automated model discovery run.

This PR updates components/manifests/base/core/models.json based on
probing Vertex AI endpoints. Validation passed — safe to auto-merge.

Unleash flags are synced automatically on deploy by the
sync-model-flags Job.

Diff

diff --git a/components/manifests/base/core/models.json b/components/manifests/base/core/models.json
index ca5d666..b1bfd15 100755
--- a/components/manifests/base/core/models.json
+++ b/components/manifests/base/core/models.json
@@ -205,6 +205,14 @@
       "provider": "google",
       "available": false,
       "featureGated": true
+    },
+    {
+      "id": "gemini-3.7-flash",
+      "label": "Gemini 3.7 Flash",
+      "vertexId": "gemini-3.7-flash@default",
+      "provider": "google",
+      "available": false,
+      "featureGated": true
     }
   ]
 }

[ambient-code]

Manifest validation passed — auto-approved by model discovery workflow

[netlify]

✅ Deploy Preview for cheerful-kitten-f556a0 canceled.

Name	Link
🔨 Latest commit	d538e43
🔍 Latest deploy log	https://app.netlify.com/projects/cheerful-kitten-f556a0/deploys/6a7ec00ed7e04200089716d1