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/op-stack-superchain/cache/.gitignore

@@ -0,0 +1,3 @@
+*
+!.gitignore
+!README.md

config/op-stack-superchain/cache/README.md

@@ -0,0 +1,9 @@
+# Cached Standard Rollup TOML (gitignored)
+
+Run from repo root:
+
+```bash
+bash scripts/op-stack/fetch-standard-mainnet-toml.sh
+```
+
+Refreshes governance validation inputs from [superchain-registry](https://github.com/ethereum-optimism/superchain-registry) `validation/standard/` for offline review.