canton-network/wallet-gateway: core/signing-securosys/README.md

# @canton-network/core-signing-securosys Signing driver for integrating the Canton Wallet Gateway with Securosys TSB. ## Features - `createKey` creates a TSB SKA key with a hardcoded empty policy, then renames it to a label derived from the public key. - `getKeys` enumerates TSB keys and returns Wal