Add CLAUDE.md guide and preprocessing comparison script

.claude/settings.local.json

@@ -12,7 +12,12 @@
       "Bash(git push:*)",
       "Bash(conda activate:*)",
       "WebSearch",
-      "Bash(pip install:*)"
+      "Bash(pip install:*)",
+      "Bash(git status:*)",
+      "Bash(git -C /Users/xxz/PycharmProjects/crypto_predictor check-ignore -v test_dlinear_jan_2026_create_labels.py)",
+      "Bash(git -C /Users/xxz/PycharmProjects/crypto_predictor status)",
+      "Bash(git -C /Users/xxz/PycharmProjects/crypto_predictor diff)",
+      "Bash(git -C /Users/xxz/PycharmProjects/crypto_predictor log --oneline -5)"
     ]
   }
 }