ops: host systemd units in git; windy-pro tags never reach Windy Git

- deploy/systemd/: sync/backup timers+services, tunnel, and the windy-job
  heartbeat drop-ins (silent-failure audit). They existed only on Veron,
  the same drift that left the runbook wrong. GITHUB_TOKEN is stripped
  (repo is public); it stays in the root-only unit on the host.
- sync: SYNC_NO_TAGS (default windy-pro). build-electron fires on v* tags
  and targets ubuntu/macos/windows-latest, labels no runner has, so it
  would queue forever, invisibly. Desktop releases are built elsewhere.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

deploy/systemd/windygit-backup.service

@@ -0,0 +1,13 @@
+[Unit]
+Description=Windy Git nightly backup (git bundles + windgit schema -> R2)
+After=network-online.target docker.service
+
+[Service]
+Type=oneshot
+WorkingDirectory=/srv/windygit/src
+# The .env holds the R2 credentials. The script refuses to run without them
+# rather than reporting a backup that did not happen.
+EnvironmentFile=/srv/windygit/src/.env
+ExecStart=/bin/bash /srv/windygit/src/scripts/backup.sh
+Nice=10
+IOSchedulingClass=idle

deploy/systemd/windygit-backup.service.d/windy-job.conf

@@ -0,0 +1,3 @@
+[Service]
+ExecStart=
+ExecStart=/usr/local/bin/windy-job windygit-backup 26h --expect "ok — [0-9]+ repos" --owner 13 -- /bin/bash /srv/windygit/src/scripts/backup.sh

deploy/systemd/windygit-backup.timer

@@ -0,0 +1,12 @@
+[Unit]
+Description=Nightly Windy Git backup
+
+[Timer]
+OnCalendar=*-*-* 04:17:00
+# Grant's workstation is not always on at 04:17. Without this a missed window
+# is simply skipped and the backup silently never runs.
+Persistent=true
+RandomizedDelaySec=600
+
+[Install]
+WantedBy=timers.target

deploy/systemd/windygit-ci-prune.service.d/windy-job.conf

@@ -0,0 +1,3 @@
+[Service]
+ExecStart=
+ExecStart=/usr/local/bin/windy-job windygit-ci-prune 7h --expect "ci storage [0-9]+G" --owner 13 -- /srv/windygit/src/deploy/runner/prune.sh

deploy/systemd/windygit-sync.service

@@ -0,0 +1,12 @@
+[Unit]
+Description=Sync GitHub -> Windy Git (Phase 1: GitHub is the source of truth)
+After=network-online.target docker.service
+
+[Service]
+Type=oneshot
+WorkingDirectory=/srv/windygit/src
+EnvironmentFile=/srv/windygit/src/.env
+# GITHUB_TOKEN is set on the host only (root-only unit file / .env) — NEVER commit it.
+Environment=GITHUB_OWNER=sneakyfree
+ExecStart=/bin/bash /srv/windygit/src/scripts/sync_from_github.sh
+Nice=10

deploy/systemd/windygit-sync.service.d/windy-job.conf

@@ -0,0 +1,3 @@
+[Service]
+ExecStart=
+ExecStart=/usr/local/bin/windy-job windygit-sync 20m --expect "all repos in step with GitHub" --owner 13 -- /bin/bash /srv/windygit/src/scripts/sync_from_github.sh

deploy/systemd/windygit-sync.timer

@@ -0,0 +1,10 @@
+[Unit]
+Description=Keep Windy Git in step with GitHub every 5 minutes
+
+[Timer]
+OnBootSec=3min
+OnUnitActiveSec=5min
+Persistent=true
+
+[Install]
+WantedBy=timers.target

deploy/systemd/windygit-tunnel.service

@@ -0,0 +1,16 @@
+[Unit]
+Description=Windy Git - Cloudflare Tunnel (the only ingress; no inbound port is opened)
+After=network-online.target
+Wants=network-online.target
+
+[Service]
+Type=notify
+ExecStart=/usr/bin/cloudflared --no-autoupdate --config /etc/cloudflared/config.yml tunnel run
+Restart=always
+RestartSec=5
+# G1.4 - bounded, so a misbehaving ingress can never starve Grant's workstation.
+MemoryMax=512M
+CPUQuota=100%
+
+[Install]
+WantedBy=multi-user.target