rootstock-bamboo: bump rskj default to VETIVER-9.0.3

Fixes testnet crash-loop after restart (Invalid block header size: 22).
Regenerated from vibe-node context.yml; includes pending template regen.

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

arc/arc/arc-testnet-arc-full.yml

@@ -163,6 +163,7 @@ services:
         condition: service_completed_successfully
       arc-testnet:
         condition: service_started
+        restart: true
     networks:
       - chains
     volumes: