Bump claude-code devcontainer feature to v3

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: chapterjason

.devcontainer/devcontainer.json

@@ -15,7 +15,7 @@
   ],
   "features": {
     "ghcr.io/sourecode/devcontainer-features/nvm:2": {},
-    "ghcr.io/sourecode/devcontainer-features/claude-code:2": {},
+    "ghcr.io/sourecode/devcontainer-features/claude-code:3": {},
     "ghcr.io/sourecode/devcontainer-features/rtk:2": {},
     "ghcr.io/sourecode/devcontainer-features/context-mode:2": {},
     "ghcr.io/sourecode/devcontainer-features/home-persist:1": {}