Fix stale final screenshot export

scripts/run_from_artifacts.py

@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 import argparse
+import base64
 import asyncio
 import json
 import re
@@ -531,6 +532,10 @@ async def main() -> None:
         json.dumps(ctx.measurement, ensure_ascii=False, indent=2),
         encoding='utf-8',
     )
+    if ctx.screenshot_b64:
+        screenshot_bytes = base64.b64decode(ctx.screenshot_b64)
+        (out_dir / 'final-screenshot-current.png').write_bytes(screenshot_bytes)
+        (out_dir / 'final-screenshot.png').write_bytes(screenshot_bytes)
     (out_dir / 'context.json').write_text(
         ctx.model_dump_json(indent=2, exclude={'screenshot_b64', 'rendered_html'}),
         encoding='utf-8',