gaiad: v27.4.0 + statesync-skip-if-data + wasm-snapshot seed (port cursor host fix)

Live chain is v27.4.0 (abci_info); v25.3.2 halts at the v26/v27 upgrade heights (ghcr
lags but v27.4.0 IS pullable). Statesync omits CosmWasm + IBC 08-wasm files -> gaia panics
'wasmlckeeper failed initialize pinned codes / Error opening Wasm file'. init.sh now: skip
statesync if data/application.db exists (idempotent restart, preserves a restored snapshot);
on fresh statesync, seed wasm from polkachu cosmos_wasmonly.tar.lz4. Porting cursor's host
fix into the repo (host /root/rpc edits get reverted by run-rpc-update re-clone).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

cosmos/gaiad/cosmos-mainnet-gaiad-pruned.yml

@@ -35,7 +35,7 @@ services:
       dockerfile: cometbft.Dockerfile
       args:
         CL_IMAGE: ${COSMOS_GAIAD_IMAGE:-ghcr.io/cosmos/gaia}
-        CL_VERSION: ${COSMOS_MAINNET_GAIAD_VERSION:-v25.3.2}
+        CL_VERSION: ${COSMOS_MAINNET_GAIAD_VERSION:-v27.4.0}
     sysctls:
       # TCP Performance
       net.ipv4.tcp_slow_start_after_idle: 0       # Disable slow start after idle
@@ -67,6 +67,7 @@ services:
       - P2P_PORT=12554
       - PERSISTENT_PEERS=a7f14a48cd97c0eae7833849ccdf4e9418622c56@65.108.128.201:14956,37dfe1ec33e9f88f378a61a32462d57d2baa5e74@65.108.99.140:26656,f86d297a28da1a2b186583daf0e229c2b1449414@144.76.217.227:26656,66ca3161c5532da890815e40826ddbbbe2cb7f6c@176.9.101.44:26656
       - STATESYNC_RPC=https://cosmos-rpc.polkachu.com:443
+      - WASM_SNAPSHOT_URL=https://snapshots.polkachu.com/wasm/cosmos/cosmos_wasmonly.tar.lz4
     restart: unless-stopped
     stop_grace_period: 5m
     networks: