fix: qualify Delivery sources and preserve compatibility

compatibility/documentation-docusaurus.md

@@ -0,0 +1,19 @@
+---
+name: documentation-docusaurus
+description: Compatibility alias for the VSSA Docusaurus adoption.
+version: 1.0.0
+license: MIT
+metadata:
+  hermes:
+    related_skills: [documentation-docusaurus-vssa]
+---
+
+# VSSA Docusaurus compatibility route
+
+Load `documentation-docusaurus-vssa` before performing documentation work.
+Its complete package is maintained at
+https://gitea.lego-cloud.eu/vssa-v1-skills-code-agent/documentation-docusaurus.
+For a legacy reference-file request, load the same relative reference path from
+`documentation-docusaurus-vssa`. Do not substitute generic guidance for VSSA content.
+Generic guidance has the distinct name `documentation-docusaurus-global` at
+https://gitea.lego-cloud.eu/home-v1-skills-code-agent/documentation-docusaurus.