Sync workspace: config, docs, scripts, CI, operator rules, and submodule pointers.

- Update dbis_core, cross-chain-pmm-lps, explorer-monorepo, metamask-integration, pr-workspace/chains
- Omit embedded publish git dirs and empty placeholders from index

Made-with: Cursor

token-aggregation-build/config/systemd/op-stack-sequencer.example.service

@@ -0,0 +1,27 @@
+# Example unit — legacy OP Stack op-geth execution client.
+# Prefer op-reth for new deployments; op-geth is approaching end-of-support.
+# Install: copy to /etc/systemd/system/, edit paths, `systemctl daemon-reload && systemctl enable --now ...`
+#
+# Replace:
+#   /opt/op-stack — install root
+#   opuser — unprivileged user
+#   /etc/op-stack/sequencer.env — EnvironmentFile (RPC URLs, JWT, flags; no keys in world-readable files)
+
+[Unit]
+Description=OP Stack op-geth (legacy) — example
+After=network-online.target
+Wants=network-online.target
+
+[Service]
+Type=simple
+User=opstack
+Group=opstack
+WorkingDirectory=/opt/op-stack
+EnvironmentFile=-/etc/op-stack/sequencer.env
+# ExecStart=/opt/op-stack/bin/geth ... (legacy fallback only; prefer op-reth)
+ExecStart=/bin/false
+Restart=on-failure
+RestartSec=10
+
+[Install]
+WantedBy=multi-user.target