Add tempo consensus parameters for RPC nodes

- Add --consensus.signing-key and --consensus.fee-recipient
- Add secrets volume for validator key storage
- Add comment with key generation instructions

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

tempo/reth/tempo-moderato-reth-pruned-trace.yml

@@ -4,6 +4,11 @@ x-logging-defaults: &logging-defaults
   options:
     max-size: "10m"
     max-file: "3"
+# Tempo node requires consensus parameters even for follower/RPC nodes.
+
+# Before starting, generate a signing key:
+#   docker run --rm -v tempo-secrets:/secrets ghcr.io/tempoxyz/tempo:sha-a1ac033 \
+#     consensus generate-private-key --output /secrets/validator_key.json
 
 # Usage:
 #
@@ -58,6 +63,8 @@ services:
     command:
       - --bootnodes=enode://daff60c56f91f13f7a01304badbf65a4b0fe71004293a1fa26e31bf9b2083cb7c176b8318219ac2a651dc26c61e094eff70ece6f440b849b8a1881c7766373bb@148.113.217.72:30014,enode://1dc8f9d6f7406cd9ea546f7dd8abc84f69fce8a88dc7315372859010e3db9235d74a93347e91732283e7b4dd22f7d3a60c81dee31a8dc6665dc7ed9aff977c20@148.113.193.121:30016,enode://c2b3cd1404534510487b96b099541d88072260d5410bcc38195d7f606decf0c0043964f6f9252869534675a80ca9f12af81d5b9c078966e9dfae4487a773cb0b@148.113.225.199:30018,enode://53fc9564e37a20aa3f53dc5b3dce124f55df6b8eab45f5b40b13d19f4753255f4b1e240c4b5004bab8f5f8698a7f8c6607d28dc9afa0018fb69526b88411d8ab@148.113.193.123:30020
       - --chain=moderato
+      - --consensus.fee-recipient=0x0000000000000000000000000000000000000000
+      - --consensus.signing-key=/secrets/validator_key.json
       - --datadir=/root/.local/share/reth
       - --discovery.port=10490
       - --engine.cross-block-cache-size=${TEMPO_MODERATO_RETH_STATE_CACHE:-4096}
@@ -92,6 +99,7 @@ services:
     volumes:
       - ${TEMPO_MODERATO_RETH_PRUNED_TRACE_DATA:-tempo-moderato-reth-pruned-trace}:/root/.local/share/reth
       - /slowdisk:/slowdisk
+      - tempo-moderato-reth-pruned-secrets:/secrets
     logging: *logging-defaults
     labels:
       - prometheus-scrape.enabled=true
@@ -108,6 +116,7 @@ services:
     shm_size: 2gb
 
 volumes:
+  tempo-moderato-reth-pruned-secrets:
   tempo-moderato-reth-pruned-trace:
 
 x-upstreams: