Institutional Vault Release v2.6.2

Institutional Vault: v2.6.2
Policy Nodes: v8.24.9
NATS: v2.6.2
configmap-init: v0.1.0

Asset and chain identification:
- The /api/assets/getExchangeRates response identifies Canton tokens with InstrumentID and RegistrarPartyID in place of ContractAddress.
- EVM blockchain drivers register using CAIP-2 identifiers, continuing the move toward CAIP-based chain identification.
- Asset lookups and balance recalculation use the supported-asset manager as the single source of truth.

Wallet and authentication:
- The legacy v1 retryAddAddress and stakingPlans endpoints are removed.