v1.5.0

What's Changed

• fix(retrieval): repair RRF fusion, ranking, FTS recall, and freshness by @denfry in #11
• feat(graph): edge confidence audit trail + architecture analytics (Phase 1/4) by @denfry in #12
• feat(architecture): architecture command + MCP tool (Phase 2/4) by @denfry in #13
• feat(navigate): path + describe graph navigation (Phase 3/4) by @denfry in #14
• feat(graph): viz upgrade + GraphML/DOT/Neo4j exports (Phase 4/4) by @denfry in #15
• release: v1.5.0 — graph analytics, navigation & interop by @denfry in #16

Full Changelog: v1.4.0...v1.5.0