Prepare source-only public release for develop.

Add cluster audit pipeline, united EA updates, brochure generators, and publication hygiene (gitignore, MT5 path desensitization, pre-upload scan). Remove tracked reports, models, and binary artifacts from the repo.

Co-authored-by: Cursor <cursoragent@cursor.com>

strategy-tester/factor_tester/data.py

@@ -0,0 +1,18 @@
+from __future__ import annotations
+
+import pandas as pd
+
+
+REQUIRED_COLUMNS = {"date", "asset", "close"}
+
+
+def load_prices_csv(file) -> pd.DataFrame:
+    df = pd.read_csv(file)
+    missing = REQUIRED_COLUMNS - set(df.columns)
+    if missing:
+        raise ValueError(f"Missing required columns: {sorted(missing)}")
+
+    df["date"] = pd.to_datetime(df["date"])
+    df = df.sort_values(["date", "asset"]).reset_index(drop=True)
+    return df
+