fix(zero-gravity): use --syncmode=full for galileo and aristotle geth

Snap sync causes a deadlock on fresh nodes: consensus sends a zero
finalized block hash at startup which geth rejects, crashing consensus.
Full sync processes blocks sequentially from genesis and avoids this.

Co-Authored-By: Claude Agent <claude@stakesquid.eu>

zero-gravity/geth/zero-gravity-aristotle-geth-pruned-pebble-path.yml

@@ -77,7 +77,7 @@ services:
       - --rpc.gascap=600000000
       - --rpc.txfeecap=0
       - --state.scheme=path
-      - --syncmode=snap
+      - --syncmode=full
       - --http
       - --http.addr=0.0.0.0
       - --http.api=eth,net,web3,debug,admin,txpool,engine

zero-gravity/geth/zero-gravity-galileo-geth-pruned-pebble-path.yml

@@ -76,7 +76,7 @@ services:
       - --rpc.gascap=600000000
       - --rpc.txfeecap=0
       - --state.scheme=path
-      - --syncmode=snap
+      - --syncmode=full
       - --http
       - --http.addr=0.0.0.0
       - --http.api=eth,net,web3,debug,admin,txpool,engine