feat: complete include/exclude observability, fix validation bugs, and organize tests

- Add structured logging for include/exclude operations with comprehensive event tracking
- Fix duplicate counting bug in validation API by eliminating double validation passes
- Simplify color identity validation UX by consolidating into single 'illegal' status
- Organize project structure by moving all test files to centralized code/tests/ directory
- Update documentation reflecting feature completion and production readiness
- Add validation test scripts and performance benchmarks confirming targets met
- Finalize include/exclude feature as production-ready with EDH format compliance

code/tests/test_lightning_direct.py

@@ -0,0 +1,36 @@
+#!/usr/bin/env python3
+"""Test Lightning Bolt directly"""
+
+import sys
+import os
+sys.path.insert(0, os.path.join(os.path.dirname(__file__), 'code'))
+
+from deck_builder.include_exclude_utils import fuzzy_match_card_name
+import pandas as pd
+
+cards_df = pd.read_csv('csv_files/cards.csv', low_memory=False)
+available_cards = set(cards_df['name'].dropna().unique())
+
+# Test if Lightning Bolt gets the right score
+result = fuzzy_match_card_name('bolt', available_cards)
+print(f"'bolt' matches: {result.suggestions[:5]}")
+
+result = fuzzy_match_card_name('lightn', available_cards)  
+print(f"'lightn' matches: {result.suggestions[:5]}")
+
+# Check if Lightning Bolt is in the suggestions
+if 'Lightning Bolt' in result.suggestions:
+    print(f"Lightning Bolt is suggestion #{result.suggestions.index('Lightning Bolt') + 1}")
+else:
+    print("Lightning Bolt NOT in suggestions!")
+    
+# Test a few more obvious ones
+result = fuzzy_match_card_name('lightning', available_cards)
+print(f"'lightning' matches: {result.suggestions[:3]}")
+
+result = fuzzy_match_card_name('warp', available_cards)
+print(f"'warp' matches: {result.suggestions[:3]}")
+
+# Also test the exact card name to make sure it's working
+result = fuzzy_match_card_name('Lightning Bolt', available_cards)
+print(f"'Lightning Bolt' exact: {result.matched_name} (confidence: {result.confidence:.3f})")