Prevent duplicate strategy trade snapshots on plan close.

Finalize plans before writing snapshots, dedupe on startup and page load, and add a cleanup script for existing repeated rows.

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

strategy_records_register.py

@@ -8,6 +8,7 @@ from flask import flash, redirect, url_for
 
 from strategy_snapshot_lib import (
     STRATEGY_SNAPSHOTS_MAX_ROWS,
+    dedupe_strategy_snapshots,
     list_strategy_snapshots_split,
 )
 
@@ -15,6 +16,11 @@ from strategy_snapshot_lib import (
 def load_strategy_records_page(
     conn, *, limit: int = STRATEGY_SNAPSHOTS_MAX_ROWS
 ) -> dict[str, Any]:
+    try:
+        if dedupe_strategy_snapshots(conn):
+            conn.commit()
+    except Exception:
+        pass
     trend, roll, symbols = list_strategy_snapshots_split(conn, limit=limit)
     return {
         "strategy_trend_records": trend,