Speed up CI by merging Python backend crates into root workspace

The three Python SDK backend crates were separate Cargo workspaces with
duplicate [patch] sections and isolated target/ directories, causing the
full dependency tree (~500 crates) to be compiled three times. Moving
them into the root workspace means the second and third builds are
essentially free.

This required several related fixes:

- Rename native lib targets from '_native' to '_native_wasm' and
  '_native_js' to avoid artifact collisions in the shared target/ dir.
  Both crates produced lib_native.so; the last one built would overwrite
  the other.

- Restructure python-build to use 'uv sync' with --no-install-package
  for the backend crates (installed separately via maturin develop) and
  'uv run --no-sync' for maturin to prevent PEP 517 editable rebuilds
  that fail due to missing release-profile runtime binaries.

- Add 'just jssandbox build' before Python SDK steps in CI so
  hyperlight-js-runtime is compiled in the shared target/ directory.

- Clean stale cargo fingerprints before release-profile maturin builds
  to force the build scripts to re-run and produce the runtime binaries.

- Update examples/Justfile integration dep syncs to skip building
  backend crates (already installed by maturin develop).

Signed-off-by: James Sturtevant <jsturtevant@gmail.com>

Author: jsturtevant

.github/workflows/ci.yml

@@ -89,32 +89,38 @@ jobs:
         run: just wasm examples
 
       # Python SDK checks go here so we don't rebuild everything from scratch on another job
-      - name: Format check
+      # Build JS sandbox first — the Python hyperlight-js backend shares the root
+      # workspace target/ and needs hyperlight-js-runtime to be compiled.
+      - name: Build JS sandbox
+        run: just jssandbox build
+
+      - name: Python SDK Format check
         run: just python fmt-check
 
-      - name: Lint
+      - name: Python SDK Lint
         run: just python lint
 
-      - name: Build
+      - name: Python SDK Build
         run: just python build
 
-      - name: Run examples
+      - name: Python SDK examples
         run: just python examples
 
-      - name: Tests
+      - name: Python SDK Tests
         run: just python python-test
 
-      - name: Fuzz
-        run: just fuzz 90
-
-      - name: Benchmark
-        run: just benchmark
+      - name: Python SDK Fuzz
+        run: just fuzz 30
 
-      - name: Run integration examples
+      - name: Run Python SDK integration examples
         env:
           COPILOT_GITHUB_TOKEN: ${{ secrets.COPILOT_TOKEN }}
         run: just integration-examples
 
+      # run last becuase it runs in build mode and messes with maturin
+      - name: Python SDK Benchmark
+        run: just benchmark
+
   javascript-sandbox:
     name: JS Sandbox · lint / build / examples
     runs-on: ubuntu-latest