Protocol 0.12.0-rc.1

Adds shared creation drafts and validation, chain-qualified game URLs and identities, EVM HTTP schemas, authorization response checks and caller action eligibility. Bot, Oracle and web can reuse the same rules while retaining their chain-specific signing, persistence and RPC adapters.

The package is bumped to 0.12.0-rc.1 for coordinated consumer testing. Existing exports remain compatible. Tests cover exact amounts, network isolation, token-policy ambiguity and recovery permissions at timeout boundaries.