[umutciloglu]

The Windows CI on master started failing after #2 merged:

Cannot find path 'C:\Users\runneradmin\AppData\Roaming\herdr\plugins\github' because it does not exist.

Our code didn't cause it. herdr 0.9.4 (herdrdev/herdr#4245, herdr plugin update) moved GitHub plugin installs:

• Old: plugins/github/<id>-<hash>/
• New: plugins/github-installations/<id>-<hash>/<pid>-<generation>/checkout/

herdr deletes only checkout/ when it cleans up an old generation, so empty generation folders can stay behind. It also leaves any legacy github/ checkout in place.

Changes

• windows.yml: the install check uses the newest generation that still has checkout/, then falls back to the legacy checkout.
• fetch-or-build.sh / fetch-or-build.ps1: the hsm and agentmail launchers search the same way. The new layout goes first because a leftover legacy checkout is out of date.
• Updated the launcher comments, which described the old temp-folder-and-move behaviour.

Testing

• Windows CI is green on this branch (test, stores, install). The install job runs the .cmd launchers.
• sh launcher, on a fake folder tree: it used the legacy install when that was all there was, then the newest generation, and it skipped a newest generation with no checkout/.