v0.40.2

Changed

• Finished the backlog ownership cleanup in core: built-in backlog command shims, bundled backlog prompts/templates, and the backlog-core package were removed so backlog functionality is owned by the marketplace module instead of specfact-cli.
• Replaced backlog-specific command-group wiring with generic member-group registration so installed modules provide backlog and policy surfaces without core overlap rules.

Fixed

• Removed the root cause of duplicate backlog command registration at startup by eliminating the split core-plus-module backlog ownership model.
• Updated core validation and IDE prompt export expectations so backlog prompt assets are no longer treated as built-in core resources.