fix(ci): Pin Black version to 24.10.0 in Code Quality workflow

The Code Quality workflow was using the latest Black version (25.x),
which has different formatting rules than Black 24.10.0 that we use
locally and in the auto-format workflow.

This caused CI to fail even after formatting files locally with Black 24.10.0.

Changes:
- Pin black==24.10.0 in code-quality.yml workflow

This ensures consistent formatting between local development,
auto-format workflow, and CI validation.

Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: remyluslosius

.github/workflows/code-quality.yml

@@ -23,7 +23,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install black flake8 pylint mypy bandit vulture radon
+          pip install black==24.10.0 flake8 pylint mypy bandit vulture radon
           cd backend && pip install -r requirements.txt
 
       - name: Black formatter