fix(release): isolate native client build caches

.github/workflows/release-candidate.yml

@@ -713,13 +713,16 @@ jobs:
           path: |
             ~/.cargo/registry
             ~/.cargo/git
-            target
-          key: registry-stack-release-clients-go-1.24.4-zig-0.12.1-glibc-2.17-${{ matrix.asset }}-${{ hashFiles('rust-toolchain.toml', 'Cargo.lock', 'release/requirements/maturin-1.9.6.txt', 'release/scripts/zig-glibc-compiler', 'release/scripts/build-linux-python-client', 'release/scripts/build-linux-node-client', 'release/scripts/assemble-registry-client-wheel.py', 'release/scripts/sync-registry-client-node.py', 'crates/registry-discovery-client-node/package-lock.json', 'crates/registry-evidence-client-node/package-lock.json', 'crates/registry-relay-client-node/package-lock.json', 'crates/registry-breg-client-node/package-lock.json', 'crates/registry-casework-client-node/package-lock.json', 'crates/registry-stack-client-node/package-lock.json') }}
+            target/release-client-python
+            target/release-client-node
+          key: registry-stack-release-isolated-clients-go-1.24.4-zig-0.12.1-glibc-2.17-${{ matrix.asset }}-${{ hashFiles('.github/workflows/release-candidate.yml', 'rust-toolchain.toml', 'Cargo.lock', 'release/requirements/maturin-1.9.6.txt', 'release/scripts/zig-glibc-compiler', 'release/scripts/build-linux-python-client', 'release/scripts/build-linux-node-client', 'release/scripts/assemble-registry-client-wheel.py', 'release/scripts/sync-registry-client-node.py', 'crates/registry-discovery-client-node/package-lock.json', 'crates/registry-evidence-client-node/package-lock.json', 'crates/registry-relay-client-node/package-lock.json', 'crates/registry-breg-client-node/package-lock.json', 'crates/registry-casework-client-node/package-lock.json', 'crates/registry-stack-client-node/package-lock.json') }}
           restore-keys: |
-            registry-stack-release-clients-go-1.24.4-zig-0.12.1-glibc-2.17-${{ matrix.asset }}-
+            registry-stack-release-isolated-clients-go-1.24.4-zig-0.12.1-glibc-2.17-${{ matrix.asset }}-
 
       - name: Build Python client wheels
         shell: bash
+        env:
+          CARGO_TARGET_DIR: ${{ github.workspace }}/target/release-client-python
         run: |
           set -euo pipefail
           rustup toolchain install 1.95.0 --profile minimal
@@ -873,6 +876,8 @@ jobs:
 
       - name: Build Node client packages
         shell: bash
+        env:
+          CARGO_TARGET_DIR: ${{ github.workspace }}/target/release-client-node
         run: |
           set -euo pipefail
           IFS=. read -r client_major client_minor client_patch <<<"${CLIENT_VERSION}"

release/scripts/test_release_workflow_structure.py

@@ -854,6 +854,18 @@ def test_builds_and_smokes_stable_native_client_packages(self) -> None:
         )
         cache_key = cargo_cache["with"]["key"]
         restore_key = cargo_cache["with"]["restore-keys"]
+        self.assertEqual(
+            cargo_cache["with"]["path"].splitlines(),
+            [
+                "~/.cargo/registry",
+                "~/.cargo/git",
+                "target/release-client-python",
+                "target/release-client-node",
+            ],
+        )
+        self.assertIn("release-isolated-clients", cache_key)
+        self.assertIn("release-isolated-clients", restore_key)
+        self.assertIn(".github/workflows/release-candidate.yml", cache_key)
         self.assertIn("go-1.24.4", cache_key)
         self.assertIn("go-1.24.4", restore_key)
         self.assertIn("zig-0.12.1-glibc-2.17", cache_key)
@@ -877,6 +889,28 @@ def test_builds_and_smokes_stable_native_client_packages(self) -> None:
         self.assertIn("expected_wheels=2", wheel)
         self.assertIn("--require-hashes --only-binary=:all:", wheel)
         self.assertIn("release/requirements/maturin-1.9.6.txt", wheel)
+        python_step = next(
+            step
+            for step in clients["steps"]
+            if step.get("name") == "Build Python client wheels"
+        )
+        node_step = next(
+            step
+            for step in clients["steps"]
+            if step.get("name") == "Build Node client packages"
+        )
+        self.assertEqual(
+            python_step["env"]["CARGO_TARGET_DIR"],
+            "${{ github.workspace }}/target/release-client-python",
+        )
+        self.assertEqual(
+            node_step["env"]["CARGO_TARGET_DIR"],
+            "${{ github.workspace }}/target/release-client-node",
+        )
+        self.assertNotEqual(
+            python_step["env"]["CARGO_TARGET_DIR"],
+            node_step["env"]["CARGO_TARGET_DIR"],
+        )
         node = step_run(document, "clients", "Build Node client packages")
         self.assertNotIn("--use-napi-cross", node)
         self.assertIn(