op-stack EL: publish p2p port + keep discovery on for node_sync nodes (49 composes)

Operator decision 2026-10-04 (sebastian): consensus-layer-synced op-stack nodes used to run
with --nodiscover / --disable-discovery and no published p2p port. A 0-peer EL can never
backfill a dropped-gossip gap, so op-node wedges in FCU-SYNCING until L1 derivation
catches up (katana 09-19..26, zircuit, mode). Blocks still arrive only via op-node; EL
peers are for gap-fill. Our own copies now discover each other implicitly.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RzxemENdcZBCxdGrzXiFvS

op/geth/lisk-sepolia-op-geth-pruned-pebble-hash.yml

@@ -45,6 +45,9 @@ services:
     ulimits:
       nofile: 1048576    # Max open files (for RPC/WS connections)
     user: root
+    ports:
+      - 10897:10897
+      - 10897:10897/udp
     expose:
       - 8545
       - 6060
@@ -55,6 +58,7 @@ services:
       - GETH_ROLLUP_SEQUENCERHTTP=https://rpc.sepolia-api.lisk.com
     entrypoint: /bin/sh -c '[ -f /config/genesis.json ] && geth --db.engine=pebble --gcmode=full --datadir /data init --state.scheme=hash /config/genesis.json; [ -f /config/static-nodes.json ] && cp -f /config/static-nodes.json /data/static-nodes.json; exec geth "$@"' --
     command:
+      - --bootnodes=enode://548f715f3fc388a7c917ba644a2f16270f1ede48a5d88a4d14ea287cc916068363f3092e39936f1a3e7885198bef0e5af951f1d7b1041ce8ba4010917777e71f@18.210.176.114:30301,enode://6f10052847a966a725c9f4adf6716f9141155b99a0fb487fea3f51498f4c2a2cb8d534e680ee678f9447db85b93ff7c74562762c3714783a7233ac448603b25f@107.21.251.55:30301
       - --datadir=/data
       - --db.engine=pebble
       - --gcmode=full
@@ -62,8 +66,9 @@ services:
       - --metrics
       - --metrics.addr=0.0.0.0
       - --metrics.port=6060
+      - --nat=extip:${IP}
       - --networkid=4202
-      - --nodiscover
+      - --port=10897
       - --rpc.gascap=600000000
       - --rpc.txfeecap=0
       - --state.scheme=hash