fix: restore tree dropped by 6d224861; land stem95su gdrive-sync (10m) [ci skip]

6d224861 came from a --no-checkout worktree whose empty index made the
commit drop every file except two. This restores 05b50d2b's full tree and
correctly adds stacks/stem95su/gdrive-sync.tf + the service-catalog stem95su
entry. Forward-only (parent=6d224861, no force-push); [ci skip] since the
live infra was never applied from the broken commit.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

scripts/t3-dispatch.service

@@ -0,0 +1,15 @@
+[Unit]
+Description=t3 per-user dispatch + auto-pair (X-authentik-username -> user instance)
+After=network.target
+
+[Service]
+Type=simple
+# Unprivileged dedicated user; the only privileged action is `sudo t3-mint`
+# (scoped in /etc/sudoers.d/t3-autopair). Compromise => mint tokens at most.
+User=t3-dispatch
+ExecStart=/usr/local/bin/t3-dispatch
+Restart=on-failure
+RestartSec=5
+
+[Install]
+WantedBy=multi-user.target