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

config/systemd/op-stack-op-node.example.service

@@ -0,0 +1,21 @@
+# Example unit — op-node (consensus) paired with an execution client such as op-reth.
+# See https://docs.optimism.io/chain-operators/getting-started
+
+[Unit]
+Description=OP Stack op-node — example
+After=network-online.target op-stack-op-reth.service
+Wants=network-online.target
+
+[Service]
+Type=simple
+User=opstack
+Group=opstack
+WorkingDirectory=/opt/op-stack
+EnvironmentFile=-/etc/op-stack/op-node.env
+# ExecStart=/opt/op-stack/bin/op-node ... (rollup.json, L1 RPC, engine auth)
+ExecStart=/bin/false
+Restart=on-failure
+RestartSec=10
+
+[Install]
+WantedBy=multi-user.target