fix: bootstrap venv before task commands in Windows smoke test

Task eagerly evaluates top-level vars including VERSION which runs
`uv run python -c` to import the project. Bootstrap the venv with
`uv sync` and set PYTHONPATH so the namespace package import works
before any task commands.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: JonZeolla

.github/workflows/ci.yml

@@ -212,16 +212,22 @@ jobs:
         shell: bash
         run: |
           cd "$RUNNER_TEMP/replace-me"
+          # Bootstrap the venv first so Task can evaluate top-level vars
+          # (VERSION uses `uv run python -c` which needs the project importable)
+          uv sync --frozen --all-extras
+          export PYTHONPATH="$PWD"
           task -v init
       - name: Run tests
         shell: bash
         run: |
           cd "$RUNNER_TEMP/replace-me"
+          export PYTHONPATH="$PWD"
           task -v test
       - name: Build Docker image
         shell: bash
         run: |
           cd "$RUNNER_TEMP/replace-me"
+          export PYTHONPATH="$PWD"
           task -v build
       - name: Verify Docker image
         shell: bash