ci: stage desktop feed on packages.healthchat.ch archive

apps/desktop/element.io/healthchat/README

@@ -48,10 +48,12 @@ feeds it into build_desktop_prepare.yaml (`config: element.io/healthchat`,
 `webapp-artifact: healthchat-webapp`) and the per-platform build_desktop_{macos,windows}.yaml
 reusables. It runs on every `healthchat-v*` tag (alongside the web build) and via
 workflow_dispatch. The reusables are pointed at THIS fork (`repository`/`ref` inputs) so the
-Electron shell, icons and the healthchat:// deep-link handler are fork-branded. On a tag push the
-`release` job attaches the staged update feed as split healthchat-desktop-feed-<ver>.tar.gz.part*
-assets (the compressed feed exceeds GitHub's 2 GiB per-asset cap) and links the public installer
-URLs on packages.healthchat.ch in the Release notes — installer binaries are not attached.
+Electron shell, icons and the healthchat:// deep-link handler are fork-branded. The `release`
+job uploads the staged update feed + installers to the versioned archive at
+packages.healthchat.ch/desktop-releases/<ver>/ (also on workflow_dispatch — the recovery path
+for a missing archive) and, on tag pushes only, links the public installer URLs in the Release
+notes. Nothing binary is attached to the GitHub Release (the compressed feed outgrew GitHub's
+2 GiB per-asset cap at 1.6.0).
 (Linux is not built: the upstream build_desktop_linux.yaml needs a build-env Docker image
 keyed by commit SHA that only exists in the upstream element-hq registry, so it can't run here.)
 
@@ -115,9 +117,11 @@ subdomain's docroot on the healthchat.ch FTP account is /public_html/packages):
               install/macos/HealthChat-<ver>.dmg + HealthChat.dmg (stable "latest")
               install/win32/<arch>/HealthChat-Setup-<ver>.exe + HealthChat-Setup.exe (stable) + *.msi
 
-The `release` job in build-healthchat-desktop.yaml stages these trees; the manually dispatched
-deploy-healthchat-desktop.yaml uploads them via lftp/FTPS (mirror -R, no-delete so prior nupkgs
-survive for delta history). Add these repo secrets:
+The `release` job in build-healthchat-desktop.yaml stages these trees and uploads them to the
+versioned archive desktop-releases/<ver>/ (sibling of desktop/ under /public_html/packages);
+the manually dispatched deploy-healthchat-desktop.yaml mirrors that archive onto the live
+desktop/ tree via lftp/FTPS (mirror -R, no-delete so prior nupkgs survive for delta history).
+Add these repo secrets:
   FTP_SERVER     hostname only (explicit FTPS / AUTH TLS on port 21; if the host cert is untrusted,
                  flip ssl:verify-certificate to no in the workflow)
   FTP_USERNAME