Move maturin test coverage into CI (#3714)

This test can take over 60s to run, which is too much for a unit test.
We'll run it in a separate CI job to retain coverage.

.github/workflows/ci.yml

@@ -436,6 +436,31 @@ jobs:
           ./uv venv
           ./${{ matrix.command }}
 
+  integration-test-maturin:
+    needs: build-binary-linux
+    name: "integration test | maturin"
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+
+      - name: "Download binary"
+        uses: actions/download-artifact@v4
+        with:
+          name: uv-linux-${{ github.sha }}
+
+      - name: "Prepare binary"
+        run: chmod +x ./uv
+
+      - name: "Compile"
+        run: |
+          echo '-e ${PROJECT_ROOT}/scripts/packages/maturin_editable' | ./uv pip compile - -o requirements.txt
+
+      - name: "Sync"
+        run: |
+          ./uv venv
+          ./uv pip sync requirements.txt
+
   cache-test-ubuntu:
     needs: build-binary-linux
     name: "check cache | ubuntu"