Asset Hub uses parent relay chain for era calculations since
it doesn't have Babe consensus module (uses Aura instead).
This fixes the crash when accessing nomination pools staking.
- Asset Hub HEZ staking set to null (was nomination-pools)
- Relay chain HEZ keeps relaychain staking only
- Wallet code prepared for Polkadot 2.0 but config disabled for now
- Add sync_from_nova.py script to merge Nova chains with Pezkuwi overlay
- Add GitHub Action for daily auto-sync
- Sync all chains from nova-base (includes Polkadot Coretime and other missing chains)
- Pezkuwi chains appear first and take priority
This fixes DOT swap crash caused by missing Polkadot Coretime chain.