ci: pin Python version to 3.13.5 across all workflows

- Update all GitHub Actions workflows to use Python 3.13.5 specifically
- Replace flexible '3.13' with exact '3.13.5' version pinning
- Update pyproject.toml requires-python and classifiers to match
- Align CI/CD with local development environment (Python 3.13.5)
- Prevent Dependabot from testing with newer Python versions like 3.13.12

.github/workflows/ci-cd.yml

@@ -9,7 +9,7 @@ on:
     types: [ published ]
 
 env:
-  PYTHON_VERSION: "3.13"
+  PYTHON_VERSION: "3.13.5"
   NODE_VERSION: "18"
 
 jobs:
@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.13"]
+        python-version: ["3.13.5"]
     
     steps:
     - name: Checkout code
@@ -89,7 +89,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v6
       with:
-        python-version: "3.13"
+        python-version: "3.13.5"
     
     - name: Install CLI
       run: |
@@ -141,7 +141,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v6
       with:
-        python-version: "3.13"
+        python-version: "3.13.5"
     
     - name: Install dependencies
       run: |
@@ -186,7 +186,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v6
       with:
-        python-version: "3.13"
+        python-version: "3.13.5"
     
     - name: Install dependencies
       run: |
@@ -286,7 +286,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v6
       with:
-        python-version: "3.13"
+        python-version: "3.13.5"
     
     - name: Build CLI package
       run: |
@@ -393,7 +393,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v6
       with:
-        python-version: "3.13"
+        python-version: "3.13.5"
     
     - name: Install dependencies
       run: |
@@ -423,7 +423,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v6
       with:
-        python-version: "3.13"
+        python-version: "3.13.5"
     
     - name: Install documentation dependencies
       run: |

.github/workflows/cli-level1-tests.yml

@@ -20,7 +20,7 @@ jobs:
     
     strategy:
       matrix:
-        python-version: [3.13]
+        python-version: [3.13.5]
     
     steps:
     - name: Checkout code

.github/workflows/gpu-benchmark.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.13]
+        python-version: [3.13.5]
         
     steps:
     - uses: actions/checkout@v4

.github/workflows/security-scanning.yml

@@ -30,7 +30,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v5
       with:
-        python-version: '3.13'
+        python-version: '3.13.5'
 
     - name: Install dependencies
       run: |
@@ -108,7 +108,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v5
       with:
-        python-version: '3.13'
+        python-version: '3.13.5'
 
     - name: Install dependencies
       run: |