fix(release): use tracked embedded models catalog

Avoid overriding the embedded models catalog during tagged builds so releases cannot panic at startup due to invalid external catalog data.

Author: NGLSL

.github/workflows/release.yaml

@@ -16,10 +16,6 @@ jobs:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0
-      - name: Refresh models catalog
-        run: |
-          git fetch --depth 1 https://github.com/router-for-me/models.git main
-          git show FETCH_HEAD:models.json > internal/registry/models/models.json
       - run: git fetch --force --tags
       - uses: actions/setup-go@v4
         with:

internal/registry/model_updater_test.go

@@ -0,0 +1,13 @@
+package registry
+
+import "testing"
+
+func TestEmbeddedModelsCatalogPassesStartupValidation(t *testing.T) {
+	if len(embeddedModelsJSON) == 0 {
+		t.Fatal("embedded models catalog is empty")
+	}
+
+	if err := loadModelsFromBytes(embeddedModelsJSON, "test"); err != nil {
+		t.Fatalf("embedded models catalog should pass startup validation: %v", err)
+	}
+}