🔒 Add Git-leaks Pre-commit Hook

This PR adds a pre-commit configuration with git-leaks to automatically detect and prevent commits containing secrets, API keys, passwords, and other sensitive information.

What's Changed

• Added .pre-commit-config.yaml with git-leaks hook
• Configured git-leaks v8.28.0 with verbose and redacted output
• Pre-commit hooks are now installed and active

Why This Matters

• Security: Prevents accidental commits of sensitive data
• Compliance: Ensures repository follows security best practices
• Automation: Runs automatically on every commit
• Team Safety: Protects all contributors from security mistakes

How It Works

• Git-leaks scans all staged files before each commit
• If secrets are detected, the commit is blocked
• Verbose output shows what was found (redacted for security)
• Contributors can fix issues before committing

Testing

✅ The setup has been tested and verified to work correctly
✅ Test commits containing secrets are properly blocked
✅ Normal commits without secrets proceed as expected

Next Steps

After merging this PR:

1. All team members should run pre-commit install in their local repos
2. Existing secrets in the repository should be rotated if any are found
3. Consider running gitleaks detect on the entire repository history

This change enhances our security posture and helps maintain clean, secure code.