fix(ci): hybrid pip download - single call for cross-platform deps

The per-dep loop regressed pydantic/pydantic-core compatibility:
each dep resolves transitive versions independently, so 'pydantic'
brings core 2.41.5 while 'pydantic-settings' brings core 2.45.0,
and the later wheel overwrites the earlier during site-packages
unzip, producing:
  SystemError: pydantic-core 2.45.0 is incompatible with
  pydantic, which requires 2.41.5

Fix: single pip-download call for CORE_DEPS + VIS_DEPS so pip
resolves compatible transitive versions. Keep the per-dep loop
with --pre only for WIN_DEPS, where each dep needs its own
platform/non-platform fallback and winsdk requires --pre for
its beta wheels.

build-dist-windows.sh

@@ -67,12 +67,19 @@ VIS_DEPS=(
     "numpy>=1.24.0,<2.0"
 )
 
-ALL_DEPS=("${CORE_DEPS[@]}" "${WIN_DEPS[@]}" "${VIS_DEPS[@]}")
+# Resolve core + visualizer deps in a SINGLE call so pip picks compatible
+# transitive versions (notably pydantic/pydantic-core must match).
+# Per-dep loops resolve each dep independently and can leave mismatched
+# transitive versions that overwrite each other in the site-packages unzip.
+CROSS_DEPS=("${CORE_DEPS[@]}" "${VIS_DEPS[@]}")
+pip download --quiet --no-cache-dir --dest "$WHEEL_DIR" \
+    --platform win_amd64 --python-version "${PYTHON_SHORT}" \
+    --implementation cp --only-binary :all: \
+    "${CROSS_DEPS[@]}"
 
-# Per-dep loop with --pre (winsdk only ships beta wheels, e.g. 1.0.0b10).
+# Windows-only deps in a loop with --pre: winsdk only ships beta wheels
-# Single-call resolution fails when one Windows-only dep can't resolve in
+# (1.0.0bNN) and each dep needs its own platform/non-platform fallback.
-# the Linux fallback branch, so we resolve each dep independently.
+for dep in "${WIN_DEPS[@]}"; do
-for dep in "${ALL_DEPS[@]}"; do
     pip download --pre --quiet --no-cache-dir --dest "$WHEEL_DIR" \
         --platform win_amd64 --python-version "${PYTHON_SHORT}" \
         --implementation cp --only-binary :all: \