Rename merkle canonicalization to composable in trust verification

[GsCommand]

Summary

Updates the trust verification schema and validation examples to rename the erc8211.merkle.v1 canonicalization method to erc8211.composable.v1, reflecting a change in the ERC-8211 specification naming.

Key Changes

• Renamed canonicalization enum value from erc8211.merkle.v1 to erc8211.composable.v1 in the proof schema
• Updated test variable name from proofMerkle to proofComposable for consistency
• Updated corresponding test case name and description to reference the new canonicalization name
• Added schema comment clarifying that erc8211.composable.v1 is the ERC-8211 composable execution canonicalization, with a note that Merkle authorization verification is deferred pending a companion ERC

Implementation Details

• The change maintains backward compatibility in structure while updating the canonicalization identifier
• All references to the old naming convention have been updated consistently across both the schema definition and validation test cases

https://claude.ai/code/session_01HQCtc5GNqzudgSrLxJby5H