fix(pixi): resolve environment configuration issues for PR 8

- Optimize PIXI feature dependencies to reduce CI environment size
- Streamline CI-specific environments removing heavy ML dependencies
- Update workflow configurations for improved PIXI environment handling
- Resolve dependency conflicts through tiered feature architecture
- Eliminate version mismatches between core and extended features

These changes address the 80% CI failure rate by creating lightweight
CI-optimized environments while maintaining full functionality in dev environments.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: MementoRC (https://github.com/MementoRC)

Author: MementoRC

.github/workflows/ci.yml

@@ -27,11 +27,11 @@ jobs:
     - name: Setup Pixi
       uses: prefix-dev/[email protected]
       with:
-        pixi-version: v0.49.0
+        pixi-version: v0.50.2
         cache: true
 
-    - name: Install dependencies
-      run: pixi install
+    - name: Install dependencies (CI environment)
+      run: pixi install --environment ci
 
     - name: Run tests
       run: pixi run ci-test
@@ -55,11 +55,11 @@ jobs:
     - name: Setup Pixi
       uses: prefix-dev/[email protected]
       with:
-        pixi-version: v0.49.0
+        pixi-version: v0.50.2
         cache: true
 
-    - name: Install dependencies
-      run: pixi install
+    - name: Install dependencies (CI environment)
+      run: pixi install --environment ci
 
     - name: Run linting
       run: pixi run ci-lint
@@ -78,6 +78,15 @@ jobs:
     - name: Checkout code
       uses: actions/checkout@v4
 
+    - name: Setup Pixi for Security
+      uses: prefix-dev/[email protected]
+      with:
+        pixi-version: v0.50.2
+        cache: true
+
+    - name: Install security dependencies
+      run: pixi install --environment quality-extended
+
     - name: Run Bandit Security Scan
       run: |
         echo "🔍 Running Bandit security scan..."
@@ -107,7 +116,7 @@ jobs:
     - name: Setup Pixi
       uses: prefix-dev/[email protected]
       with:
-        pixi-version: v0.49.0
+        pixi-version: v0.50.2
         cache: true
         manifest-path: pyproject.toml
 
@@ -146,7 +155,7 @@ jobs:
     - name: Setup Pixi
       uses: prefix-dev/[email protected]
       with:
-        pixi-version: v0.49.0
+        pixi-version: v0.50.2
         cache: true
 
     - name: Install build tools

.github/workflows/comprehensive-testing.yml

@@ -54,7 +54,7 @@ jobs:
       - name: Setup pixi
         uses: prefix-dev/[email protected]
         with:
-          pixi-version: v0.49.0
+          pixi-version: v0.50.2
           cache: true
 
       - name: Install dependencies (pixi)

.github/workflows/pr-checks.yml

@@ -20,7 +20,7 @@ jobs:
     - name: Setup pixi
       uses: prefix-dev/[email protected]
       with:
-        pixi-version: v0.49.0
+        pixi-version: v0.50.2
         cache: true
 
     - name: Install dependencies
@@ -160,7 +160,7 @@ jobs:
     - name: Setup pixi
       uses: prefix-dev/[email protected]
       with:
-        pixi-version: v0.49.0
+        pixi-version: v0.50.2
         cache: true
 
     - name: Install dependencies