fix(install.ps1): record 'skipped-long-path' when ConvertTo-LongPath short-circuits

The ordinary-long-path early return now records why no resolver ran, so
the ResolvedPathReport stays truthful instead of silently inheriting a
stale value from an earlier call in the same session. Diagnostics hunk
taken from PR #93100.

Co-authored-by: aniruddhaadak80 <aniruddhaadak80@users.noreply.github.com>

scripts/install.ps1

@@ -248,7 +248,10 @@ function ConvertTo-LongPath {
     if ([string]::IsNullOrWhiteSpace($Path)) { return $Path }
     # Only 8.3 short names carry a tilde+digit ("~1"); skip every resolver for
     # ordinary long paths, which is the overwhelmingly common case.
-    if ($Path -notmatch '~\d') { return $Path }
+    if ($Path -notmatch '~\d') {
+        $script:LastResolver = 'skipped-long-path'
+        return $Path
+    }
 
     # 1. kernel32. Compiled on first use only, so a normal profile never pays
     #    the Add-Type cost (this file is re-entered once per install stage).