fix: add cache fallback to status workflow for complete CI resilience

Complete the GitHub Actions cache fallback implementation by updating the status.yml workflow with the same robust cache handling strategy used in other workflows.

IMPROVEMENTS:
- Add manual pixi installation fallback when cache service fails
- Implement retry logic for dependency installation
- Ensure status checks can run independently of GitHub cache service
- Maintain consistency with other workflow cache handling patterns

This completes the comprehensive cache service outage resilience across all GitHub Actions workflows, ensuring CI can function during GitHub infrastructure disruptions.

🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>

Author: MementoRC

.github/workflows/status.yml

@@ -14,15 +14,49 @@ jobs:
     - name: Checkout code
       uses: actions/checkout@v4
 
-    - name: Setup pixi
+    - name: Setup pixi with cache (attempt 1)
+      id: setup-pixi-cache
       uses: prefix-dev/setup-pixi@v0.8.1
       with:
         pixi-version: v0.49.0
         cache: true
+      continue-on-error: true
 
-    - name: Install dependencies
+    - name: Verify Pixi installation or install manually if cache failed
+      if: steps.setup-pixi-cache.outcome == 'failure' || (runner.os == 'Windows' && !contains(env.PATH, '.pixi\\bin')) || (runner.os != 'Windows' && !command -v pixi)
       run: |
-        pixi install --locked
+        echo "Pixi not found on PATH or setup-pixi-cache failed. Attempting manual installation."
+        if [ "${{ runner.os }}" == "Windows" ]; then
+          curl -L -o pixi.exe https://github.com/prefix-dev/pixi/releases/download/v0.49.0/pixi-x86_64-pc-windows-msvc.exe
+          mkdir -p "$HOME/.pixi/bin"
+          mv pixi.exe "$HOME/.pixi/bin/"
+          echo "$HOME/.pixi/bin" >> $GITHUB_PATH
+        else
+          curl -fsSL https://pixi.sh/install.sh | bash
+          echo "$HOME/.pixi/bin" >> $GITHUB_PATH
+        fi
+        echo "Pixi installed manually."
+
+    - name: Activate pixi environment and install dependencies (with retry)
+      run: |
+        eval "$(pixi shell --env-hook bash)"
+        if ! command -v pixi &> /dev/null; then
+          echo "Error: pixi command not found after activation. Environment setup failed."
+          exit 1
+        fi
+        echo "Attempting to install pixi dependencies..."
+        n=0
+        until [ "$n" -ge 3 ]
+        do
+          pixi install --locked && break
+          n=$((n+1))
+          echo "pixi install failed, retrying ($n/3)..."
+          sleep 5
+        done
+        if [ "$n" -ge 3 ]; then
+          echo "Failed to install dependencies after multiple retries."
+          exit 1
+        fi
 
     - name: Quick smoke test
       run: |
@@ -55,4 +89,4 @@ jobs:
         pixi run ruff check src/ --select=F,E9 --quiet || echo "⚠️ Some lint issues found"
         echo "✅ Critical lint check completed"
         
-        echo "🎉 Quick check passed!"
+        echo "🎉 Quick check passed!"