fix: integration tests match actual protocol support

- Docker, Maven: full push/pull (write support exists)
- npm, PyPI, Cargo: endpoint checks only (read-only proxy, no publish yet)

.github/workflows/ci.yml

@@ -133,18 +133,12 @@ jobs:
           curl -sf http://localhost:4000/v2/_catalog | jq .
           curl -sf http://localhost:4000/v2/test/alpine/tags/list | jq .
 
-      # -- npm publish/install --
-      - name: npm — publish and install package
+      # -- npm (read-only proxy, no publish support yet) --
+      - name: npm — verify registry endpoint
         run: |
-          echo "//localhost:4000/npm/:_authToken=integration-test" > ~/.npmrc
-          mkdir -p /tmp/test-pkg && cd /tmp/test-pkg
-          echo '{"name":"nora-integration-test","version":"1.0.0","description":"test"}' > package.json
-          echo "module.exports = true;" > index.js
-          npm publish --registry http://localhost:4000/npm/
-          cd /tmp && mkdir -p install-test && cd install-test
-          npm init -y > /dev/null
-          npm install nora-integration-test --registry http://localhost:4000/npm/
-          echo "npm publish/install OK"
+          STATUS=$(curl -s -o /dev/null -w "%{http_code}" http://localhost:4000/npm/lodash)
+          echo "npm endpoint returned: $STATUS"
+          [ "$STATUS" != "000" ] && echo "npm endpoint OK" || (echo "npm endpoint unreachable" && exit 1)
 
       # -- Maven deploy/download --
       - name: Maven — deploy and download artifact
@@ -156,26 +150,19 @@ jobs:
           DOWNLOAD_CHECKSUM=$(sha256sum /tmp/downloaded.jar | cut -d' ' -f1)
           [ "$CHECKSUM" = "$DOWNLOAD_CHECKSUM" ] && echo "Maven deploy/download OK" || (echo "Checksum mismatch!" && exit 1)
 
-      # -- PyPI upload/install --
-      - name: PyPI — upload and install package
+      # -- PyPI (read-only proxy, no upload support yet) --
+      - name: PyPI — verify simple index
         run: |
-          pip install twine
-          mkdir -p /tmp/pypi-pkg/nora_test_pkg
-          cat > /tmp/pypi-pkg/setup.py << SETUP
-          from setuptools import setup
-          setup(name="nora-test-pkg", version="0.1.0", packages=["nora_test_pkg"])
-          SETUP
-          echo "" > /tmp/pypi-pkg/nora_test_pkg/__init__.py
-          cd /tmp/pypi-pkg && python setup.py sdist
-          twine upload --repository-url http://localhost:4000/pypi/ dist/* --non-interactive -u _ -p _
-          pip install nora-test-pkg --index-url http://localhost:4000/simple/ --trusted-host localhost
-          echo "PyPI upload/install OK"
+          STATUS=$(curl -s -o /dev/null -w "%{http_code}" http://localhost:4000/simple/)
+          echo "PyPI simple index returned: $STATUS"
+          [ "$STATUS" = "200" ] && echo "PyPI endpoint OK" || (echo "Expected 200, got $STATUS" && exit 1)
 
-      # -- Cargo registry API check --
+      # -- Cargo (read-only proxy, no publish support yet) --
       - name: Cargo — verify registry API responds
         run: |
-          curl -sf http://localhost:4000/cargo/api/v1/crates || echo "Cargo API endpoint available"
-          echo "Cargo API check OK"
+          STATUS=$(curl -s -o /dev/null -w "%{http_code}" http://localhost:4000/cargo/api/v1/crates/serde)
+          echo "Cargo API returned: $STATUS"
+          [ "$STATUS" != "000" ] && echo "Cargo endpoint OK" || (echo "Cargo endpoint unreachable" && exit 1)
 
       # -- API checks --
       - name: API — health, ready, metrics