MILABL-6766 Fix rapids env issues for non docker envs

.changeset/fix-rapids-path-expression.md

@@ -0,0 +1,11 @@
+---
+'@platforma-open/milaboratories.runenv-python-3.12.10-rapids': patch
+---
+
+Fix the RAPIDS runenv `PATH` env var breaking every non-docker run: use `$PATH` instead of `${PATH}`.
+`envVars` feeds two consumers with different syntaxes. The Dockerfile generator emits each entry as an `ENV` line, where Docker expands both `${PATH}` and `$PATH` at build time. The native (venv) path renders each entry through the backend's expr-lang renderer, whose scanner regex `{.*?[^\\]}` matches the `{PATH}` inside `${PATH}` and fails with `cannot evaluate expression: "PATH" (variable is not defined)` — rejecting the venv-creation RunCommand, so any block on this runenv failed on a local/desktop backend while docker-backed backends were fine.
+`$PATH` carries no braces, so it expands correctly in the Dockerfile and is passed through literally on the native path, where the backend already appends the host `PATH` after any `PATH` entry in `envVars`.
+
+Add `pyarrow==19.0.1` to the RAPIDS runenv.
+Blocks on this runenv install their `requirements.txt` with `pip --no-index --find-links <runenv packages>`, so a requirement the runenv does not ship cannot resolve. `pyarrow` was never declared here (every sibling runenv declares it), so any block importing it failed with `No matching distribution found for pyarrow` on every platform where the `cu12` packages are skipped — macOS, Windows and linux-aarch64. On linux-x64 it resolved only incidentally, as a transitive dependency of `cudf-cu12`.
+Version is capped by RAPIDS: `cudf-cu12==25.4.0` requires `pyarrow>=14.0.0,<20.0.0a0` (plus `!=17.0.0` on aarch64), making 19.0.1 the highest usable release. That is why it differs from the 21.0.0 / 24.0.0 pinned by the non-RAPIDS runenvs. cp312 wheels exist for all five target platforms.

python-3.12.10-rapids/config.json

@@ -12,6 +12,7 @@
       "numpy==2.0.2",
       "scikit-learn==1.7.2",
       "scipy==1.16.2",
+      "pyarrow==19.0.1",
       "umap-learn==0.5.7",
       "torch==2.7.0",
       "cudf-cu12==25.4.0",

python-3.12.10-rapids/package.json

@@ -26,7 +26,7 @@
               "NVIDIA_VISIBLE_DEVICES=all",
               "NVIDIA_DRIVER_CAPABILITIES=compute,utility",
               "LD_LIBRARY_PATH=/usr/local/nvidia/lib64:/usr/local/nvidia/lib",
-              "PATH=/usr/local/nvidia/bin:${PATH}",
+              "PATH=/usr/local/nvidia/bin:$PATH",
               "PTXCOMPILER_CHECK_NUMBA_CODEGEN_PATCH_NEEDED=0"
             ],
             "roots": {