hemi mainnet: syncmode full -> snap

hemi cannot full-sync across old BTC reorg points: EVM blocks referencing
orphaned Bitcoin Attributes ancestors are unexecutable once no peer retains
the stale BTC block (us-16 wedged at 3353463 on reorged-out block
00000000000000000001dcb3...b971). hemi's official l2-config.toml ships
SyncMode=snap. Registry: 150 entries gain node names (regen enrichment).

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

op/geth/hemi-mainnet-op-geth-pruned-leveldb-hash.yml

@@ -83,7 +83,7 @@ services:
       - --rpc.gascap=600000000
       - --rpc.txfeecap=0
       - --state.scheme=hash
-      - --syncmode=full
+      - --syncmode=snap
       - --tbc.leveldbhome=/data/tbc/data
       - --tbc.network=mainnet
       - --http