[phase 1.7] add suite cross-link to README

Author: cmangun

README.md

@@ -1,5 +1,7 @@
 # agentic-evidence-viewer
 
+> Part of the [Agentic Evidence Suite](https://github.com/cmangun/agentic-evidence) — six interoperating components for verifiable agentic AI. See [`REFERENCE-ARCHITECTURE.md`](https://github.com/cmangun/agentic-evidence/blob/main/REFERENCE-ARCHITECTURE.md) for the suite-level architecture.
+
 A drag-drop viewer for **agent traces, receipts, policy decisions, and artifacts**.
 
 This repo lets a reviewer open a bundle and see:
@@ -60,4 +62,4 @@ This repo is part of the **Agentic Evidence Suite**:
 
 ## License
 
-MIT
+MIT