fix: resolve CI issues in v2-api-tests workflow

- Replace curl with wget in healthchecks (curl not available in ChromaDB container)
- Fix checkout action version from v5 to v4 (v5 doesn't exist)
- Fix download-artifact action version from v5 to v4
- Use /api/v1 endpoint for healthcheck (more reliable)

Author: tazarov

.github/workflows/v2-api-tests.yml

@@ -73,14 +73,14 @@ jobs:
           CHROMA_SERVER_AUTH_TOKEN_TRANSPORT_HEADER: 'X_CHROMA_TOKEN'
           CHROMA_SERVER_AUTH_CREDENTIALS: 'test-token'
         options: >-
-          --health-cmd "curl -f http://localhost:8000/api/v2 || exit 1"
+          --health-cmd "wget -q --spider http://localhost:8000/api/v1 || exit 1"
           --health-interval 10s
           --health-timeout 5s
           --health-retries 5
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v4
 
       - name: Set up Java ${{ matrix.java-version }}
         uses: actions/setup-java@v4
@@ -197,7 +197,7 @@ jobs:
 
     steps:
       - name: Download all test results
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v4
         with:
           path: test-artifacts
 
@@ -266,14 +266,14 @@ jobs:
           ALLOW_RESET: 'TRUE'
           IS_PERSISTENT: 'FALSE'
         options: >-
-          --health-cmd "curl -f http://localhost:8000/api/v2 || exit 1"
+          --health-cmd "wget -q --spider http://localhost:8000/api/v1 || exit 1"
           --health-interval 10s
           --health-timeout 5s
           --health-retries 5
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v4
 
       - name: Set up Java 17
         uses: actions/setup-java@v4