Create upgrade compatibility between kbind v1 and v2

[cnvergence]

Create upgrade compatibility between kbind v1 and v2.

Scope

• Identify breaking changes between v1 and v2
• Define the compatibility strategy for existing v1 users
• Implement migration or adaptation paths where needed
• Verify v1 workflows can continue working or fail gracefully with clear guidance
• Document the upgrade path and any limitations

Success criteria

• Compatibility approach is clearly defined and implemented
• Users have a documented path from v1 to v2
• Breaking changes are minimized or mitigated where possible