feat: optimize code quality with pylint analysis and critical fixes - Issue #130

- Fixed critical CLI function redefinition (E0102): renamed duplicate list() to list_paradigms()
- Fixed CLI parameter passing errors (E1120): updated main() calls with standalone_mode=False
- Removed 20+ unused imports across 6 files (W0611 optimization)
- Added missing final newlines to 10 files (C0304 compliance)
- Optimized control flow patterns: removed unnecessary else-after-return
- Enhanced string comparisons using 'in' operator for better readability
- Maintained pylint score at 8.34/10 while eliminating critical runtime risks

Created follow-up Issue #131 for remaining optimizations:
- 200 broad exception handling instances
- 106 variable shadowing cases
- 278 import organization improvements
- 391 line length standardizations

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

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

markitect/performance_tracker.py

@@ -7,8 +7,6 @@ performance index calculation for monitoring system performance over time.
 
 import sqlite3
 import json
-import time
-import hashlib
 from datetime import datetime
 from pathlib import Path
 from typing import Dict, List, Optional, Any
@@ -314,4 +312,4 @@ class PerformanceTracker:
             },
             "trend_analysis": trend_analysis,
             "history_count": len(history)
-        }
+        }