cross-reference tails merge roadmaps

I kept having trouble finding links to the right thing. Hopefully this
will clarify things.

policy/tpa-rfc-73-tails-infra-merge-roadmap.md

@@ -12,6 +12,16 @@ discussion:
 
 Summary: Tails infra merge roadmap.
 
+Note that the actual future work on this is tracked in milestones:
+
+- [2024](https://gitlab.torproject.org/groups/tpo/tpa/-/milestones/17)
+- [2025](https://gitlab.torproject.org/groups/tpo/tpa/-/milestones/18)
+
+There, the work is broken down in individual issues and "as-built"
+plans might change. The page here details the original plan agreed
+upon at the end of 2024, the authoritative version is made of the
+various milestones above.
+
 # Background
 
 In 2023, Tor and Tails started discussing the possibility of a merge and, in

roadmap/tails-merge.md

@@ -2,6 +2,11 @@
 tags: tor, sysadmin
 ---
 
+NOTE: this document was a preliminary roadmap designed in the early
+days of the Tor / Tails merge, as part of a wider organizational
+feasibility study. It is kept for historical reference, the actual
+roadmap is now in [TPA-RFC-73](policy/tpa-rfc-73-tails-infra-merge-roadmap).
+
 # TPA/Tails sysadmins Overview
 
 **Deadlines**: