fix: add compare utils

Author: Chamberlain0w0

scripts/compare_utils.py

@@ -0,0 +1,31 @@
+from pathlib import Path
+import sys
+
+
+def collect_log_files(base_dir: Path):
+    """Collect comparable training logs keyed by basename."""
+    files = {}
+    duplicates = {}
+
+    for path in base_dir.rglob("*.log"):
+        if path.name.startswith("build") or path.name.endswith("_profile.log"):
+            continue
+
+        key = path.name
+        if key in files:
+            duplicates.setdefault(key, [files[key]]).append(path)
+            continue
+        files[key] = path
+
+    return files, duplicates
+
+
+def exit_if_duplicate_logs(base_dir: Path, duplicates):
+    """Abort when duplicate basenames make comparison ambiguous."""
+    if not duplicates:
+        return
+
+    print(f"Found duplicate log basenames in {base_dir.resolve()}, cannot compare safely:")
+    for name, paths in sorted(duplicates.items()):
+        print(f"  {name}: {', '.join(str(p.relative_to(base_dir)) for p in paths)}")
+    sys.exit(1)