Release v4.223.0

Added

• A new MCP tool, trace-lineage, traces one read-model property back to its sources. It follows every projection or reducer mapping, AutoMap, join and child mapping to the event property, then to the command property or capture source that produces it, and returns the result as a paged tree. A missing mapping or producer is reported at the hop where the chain breaks, several sources appear as branches, and code the model cannot see into is marked as opaque instead of guessed. The tool is read-only and advisory. (#388)