release: v1.2.1 — fallback skills + mempalace directive

Bake pi-extensions + mempalace skills into the image (available without a
mounted skillset) and add the mempalace session-start proactive-load directive
so frequently-recreated containers actually pick the skill up. Closes the
fork/recall + mempalace under-utilisation gap.

CHANGELOG: [Unreleased] -> v1.2.1.

CHANGELOG.md

@@ -11,7 +11,13 @@ Pre-v1.0.0 tags followed the pi npm version (`v{pi_version}[letter]`).
 
 ---
 
-## [Unreleased]
+## v1.2.1 — 2026-06-22
+
+Patch release: close the fork/recall + mempalace **under-utilisation gap** in
+containers started without the private `skillset` repo — bake the
+`pi-extensions` and `mempalace` skills into the image and add the missing
+mempalace session-start directive. pi version is re-resolved from npm `latest`
+at build.
 
 ### Added