feat: expand mailbox evidence scanner

src/email_connect/cli.py

@@ -38,6 +38,7 @@ def main(argv: list[str] | None = None) -> int:
             report_only_new=args.report_only_new,
             dry_run=args.dry_run,
             fixture_dir=args.fixture_dir,
+            since=args.since,
         )
         print(f"scan_id={result.scan.scan_id}")
         print(f"messages_seen={result.scan.messages_seen}")