chore: add ai cache to ci

.github/workflows/ci.yml

@@ -36,6 +36,7 @@ env:
   ORT_DYLIB_PATH: /tmp/onnxruntime/lib/libonnxruntime.so
   RUST_LOG: ext_event_worker=trace
   ESZIP_TESTDATA_REPO: supabase/edge-runtime-test-eszip
+  EXT_AI_CACHE_DIR: /home/runner/.cache/ext-ai-cache
 
 jobs:
   cargo-fmt:
@@ -147,6 +148,19 @@ jobs:
           ACCESS_KEY_ID: ${{ secrets.SUPABASE_S3_ACCESS_KEY }}
           SECRET_ACCESS_KEY: ${{ secrets.SUPABASE_S3_SECRET }}
 
+      - name: Set AI model cache directory
+        run: |
+          echo "EXT_AI_CACHE_DIR=$HOME/.cache/ext-ai-cache" >> .env
+        shell: bash
+
+      - name: Cache AI models
+        uses: actions/cache@v4
+        with:
+          path: ${{ env.EXT_AI_CACHE_DIR }}
+          key: ext-ai-cache-${{ runner.os }}-v1
+          restore-keys: |
+            ext-ai-cache-${{ runner.os }}-
+
       - name: Generate code coverage
         id: coverage
         run: |

crates/base/test_cases/ai-ort-rust-backend/transformers-js/feature-extraction/index.ts

@@ -6,8 +6,10 @@ import {
 
 import { round6 } from "../util.ts";
 
-// Ensure we do not use browser cache
-env.useBrowserCache = false;
+// Browser cache is supported by `deno_cache`
+// env.useBrowserCache = true; -> Default config
+
+// Ensure we do not use local models
 env.allowLocalModels = false;
 
 const pipe = await pipeline("feature-extraction", "supabase/gte-small", {