scripts/taler-landing: hernani user systemd timer for central stats

Install path for hernani@koopa: oneshot service plus 2-minute timer that
runs the bank full scan and refreshes exchange/merchant stats via podman.

configs/systemd/user/taler-landing-stats.service

@@ -0,0 +1,30 @@
+[Unit]
+Description=Taler landing stats (bank full scan + exchange/merchant)
+Documentation=file:%h/src/koopa/koopa-admin-log/scripts/taler-landing/README.md
+After=network-online.target
+Wants=network-online.target
+# Prefer after containers are up (ignore if unit names differ)
+After=container-taler-hacktivism-bank.service container-taler-hacktivism.service
+After=taler-bank-apps.service taler-merchant-apps.service
+
+[Service]
+Type=oneshot
+Nice=10
+TimeoutStartSec=480
+# Do not keep "active" after run — timer may fire again cleanly
+RemainAfterExit=no
+Environment=TZ=Europe/Zurich
+Environment=ADMIN_LOG=%h/src/koopa/koopa-admin-log
+Environment=SECRETS_BANK=%h/src/koopa/koopa-admin-secrets/koopa/host-root/taler-bank
+Environment=BANK_URL=http://127.0.0.1:9012
+Environment=BANK_PUBLIC_URL=https://bank.hacktivism.ch
+Environment=EXCHANGE_CONFIG_URL=https://exchange.hacktivism.ch/config
+# All accounts except exchange (double-count of withdraw credits on exchange ledger)
+Environment=SCAN_SKIP=exchange
+Environment=TX_PAGE=500
+Environment=MAX_TX_PAGES=0
+Environment=ACCOUNTS_DELTA=-10000
+ExecStart=%h/.local/bin/collect-landing-stats.sh
+
+[Install]
+WantedBy=default.target

configs/systemd/user/taler-landing-stats.timer

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+[Unit]
+Description=Timer · Taler landing stats (every 2 min)
+Documentation=file:%h/src/koopa/koopa-admin-log/scripts/taler-landing/README.md
+
+[Timer]
+OnBootSec=90s
+OnUnitActiveSec=2min
+AccuracySec=20s
+Persistent=true
+Unit=taler-landing-stats.service
+
+[Install]
+WantedBy=timers.target