fix: use full URL in moderation DM notifications (#678)

batch['url'] returns relative path, prepend base_url for clickable link.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude Opus 4.5 <[e-mail]>

scripts/moderation_loop.py

···
 
             if not dry_run:
                 batch = await mod.create_batch(human_uris, created_by="moderation_loop")
-                msg = f"{get_header(env)} {batch['flag_count']} need review:\n{batch['url']}"
+                full_url = f"{mod.base_url.rstrip('/')}{batch['url']}"
+                msg = (
+                    f"{get_header(env)} {batch['flag_count']} need review:\n{full_url}"
+                )
                 await dm.send(msg)
                 console.print(f"[green]sent batch {batch['id']}[/green]")
             else: