Release v0.18.0

Summary

Exact authored Marten logical tenancy declarations are now visible as located loss evidence without inventing effective runtime tenancy, tenant data, or database topology.

Added

• Retain current and legacy Single/Conjoined event tenancy declarations as MARTEN0013. (#3)
• Retain exact per-document fluent tenancy, tenancy attributes, and global policy declarations without expanding their effects. (#3)
• Add pinned canonical tenancy evidence while preserving generated source and artifact counts. (#3)

Fixed

• Keep computed, cast, default, compound, invalid, stale, and generic unresolved tenancy expressions fail-closed. (#3)
• Prevent attributes, policies, callbacks, and configuration-only types from originating documents, tenant-specific artifacts, relationships, or topology. (#3)