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/soneium-minato-sepolia-op-geth-archive-leveldb-hash.yml

@@ -58,6 +58,7 @@ services:
       - GETH_ROLLUP_SEQUENCERHTTP=https://rpc.soneium.org
     entrypoint: /bin/sh -c 'exec geth "$@"' --
     command:
+      - --cache=${SONEIUM_MINATO_SEPOLIA_OP_GETH_ARCHIVE_LEVELDB_HASH_CACHE:-1024}
       - --datadir=/data
       - --db.engine=leveldb
       - --gcmode=archive