cache knobs: env-parameterize geth/op-geth --cache (default 1024 = geth's own), l2geth --cache (default 8192 = previous hardcoded), nethermind MEMORYHINT (default 2048000000)

All defaults preserve current effective behavior - this deploy is a rendering no-op
until a host_var overrides a value. Part of the resource-optimizer knob rollout
(resource-optimizer/knob-manifest.yaml is the registry; verify_manifest.py enforces
default sync between templates and envfile).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

op/geth/lisk-sepolia-op-geth-archive-leveldb-hash.yml

@@ -59,6 +59,7 @@ services:
     entrypoint: /bin/sh -c '[ -f /config/genesis.json ] && geth --db.engine=leveldb --gcmode=archive --datadir /data init --state.scheme=hash /config/genesis.json; exec geth "$@"' --
     command:
       - --bootnodes=enode://548f715f3fc388a7c917ba644a2f16270f1ede48a5d88a4d14ea287cc916068363f3092e39936f1a3e7885198bef0e5af951f1d7b1041ce8ba4010917777e71f@18.210.176.114:30301,enode://6f10052847a966a725c9f4adf6716f9141155b99a0fb487fea3f51498f4c2a2cb8d534e680ee678f9447db85b93ff7c74562762c3714783a7233ac448603b25f@107.21.251.55:30301
+      - --cache=${LISK_SEPOLIA_OP_GETH_ARCHIVE_LEVELDB_HASH_CACHE:-1024}
       - --datadir=/data
       - --db.engine=leveldb
       - --gcmode=archive