fix(ci): upgrade setup-pixi action to v0.9.3

The v0.8.1 action was failing with pixi setup errors.
Upgrade to latest v0.9.3 which may resolve compatibility issues.

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

Co-Authored-By: Claude Opus 4.5 <[email protected]>

Author: MementoRC

.github/workflows/ci.yml

@@ -33,7 +33,7 @@ jobs:
       uses: actions/checkout@v4
 
     - name: Setup pixi
-      uses: prefix-dev/setup-pixi@v0.8.1
+      uses: prefix-dev/setup-pixi@v0.9.3
       with:
         pixi-version: v0.50.2
         cache: false
@@ -71,7 +71,7 @@ jobs:
       uses: actions/checkout@v4
 
     - name: Setup pixi
-      uses: prefix-dev/setup-pixi@v0.8.1
+      uses: prefix-dev/setup-pixi@v0.9.3
       with:
         pixi-version: v0.50.2
         cache: false
@@ -107,7 +107,7 @@ jobs:
       uses: actions/checkout@v4
 
     - name: Setup pixi
-      uses: prefix-dev/setup-pixi@v0.8.1
+      uses: prefix-dev/setup-pixi@v0.9.3
       with:
         pixi-version: v0.50.2
         cache: false
@@ -152,7 +152,7 @@ jobs:
       uses: actions/checkout@v4
 
     - name: Setup pixi
-      uses: prefix-dev/setup-pixi@v0.8.1
+      uses: prefix-dev/setup-pixi@v0.9.3
       with:
         pixi-version: v0.50.2
         cache: false
@@ -200,7 +200,7 @@ jobs:
       uses: actions/checkout@v4
 
     - name: Setup pixi
-      uses: prefix-dev/setup-pixi@v0.8.1
+      uses: prefix-dev/setup-pixi@v0.9.3
       with:
         pixi-version: v0.50.2
         cache: false

.github/workflows/comprehensive-testing.yml

@@ -52,7 +52,7 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Setup pixi
-        uses: prefix-dev/setup-pixi@v0.8.1
+        uses: prefix-dev/setup-pixi@v0.9.3
         with:
           pixi-version: v0.50.2
           cache: false

.github/workflows/performance-testing.yml

@@ -23,7 +23,7 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Setup pixi
-        uses: prefix-dev/setup-pixi@v0.8.1
+        uses: prefix-dev/setup-pixi@v0.9.3
         with:
           pixi-version: v0.50.2
           cache: false

.github/workflows/pr-checks.yml

@@ -25,7 +25,7 @@ jobs:
         fetch-depth: 0  # Get full history for diff analysis
 
     - name: Setup pixi
-      uses: prefix-dev/setup-pixi@v0.8.1
+      uses: prefix-dev/setup-pixi@v0.9.3
       with:
         pixi-version: v0.50.2
         cache: false
@@ -173,7 +173,7 @@ jobs:
       uses: actions/checkout@v4
 
     - name: Setup pixi
-      uses: prefix-dev/setup-pixi@v0.8.1
+      uses: prefix-dev/setup-pixi@v0.9.3
       with:
         pixi-version: v0.50.2
         cache: false

.github/workflows/quality-metrics.yml

@@ -21,7 +21,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Setup pixi
-        uses: prefix-dev/setup-pixi@v0.8.1
+        uses: prefix-dev/setup-pixi@v0.9.3
         with:
           pixi-version: v0.50.2
           cache: false

.github/workflows/status.yml

@@ -15,7 +15,7 @@ jobs:
       uses: actions/checkout@v4
 
     - name: Setup pixi
-      uses: prefix-dev/setup-pixi@v0.8.1
+      uses: prefix-dev/setup-pixi@v0.9.3
       with:
         pixi-version: v0.50.2
         cache: false

.github/workflows/test-matrix.yml

@@ -31,7 +31,7 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Setup pixi
-        uses: prefix-dev/setup-pixi@v0.8.1
+        uses: prefix-dev/setup-pixi@v0.9.3
         with:
           pixi-version: v0.50.2
           cache: false