tac mainnet: merge Polkachu seeds in init.sh for peer discovery

Call ct_merge_seeds() so SEEDS env populates config.toml; default
STATESYNC_RPC to tacchain-rpc.polkachu.com for statesync bootstrap.

tac/scripts/init.sh

@@ -8,7 +8,7 @@ HOME_DIR="/root/.tacchaind"
 CONFIG_DIR="$HOME_DIR/config"
 CHAIN_ID="${CHAIN_ID:-tacchain_239-1}"
 GENESIS_URL="${GENESIS_URL:-https://raw.githubusercontent.com/TacBuild/tacchain/refs/heads/main/networks/tacchain_239-1/genesis.json}"
-STATESYNC_RPC="${STATESYNC_RPC:-https://tendermint.rpc.tac.build}"
+STATESYNC_RPC="${STATESYNC_RPC:-https://tacchain-rpc.polkachu.com:443}"
 MIN_GAS="${MIN_GAS:-25000000000utac}"
 API="${API:-eth,net,web3,txpool,debug}"
 MONIKER="${MONIKER:-rpc-node}"
@@ -25,6 +25,7 @@ else
 fi
 
 ct_patch_p2p            "$CONFIG_DIR/config.toml" "$IP" "${P2P_PORT:-26656}"
+ct_merge_seeds          "$CONFIG_DIR/config.toml" "$SEEDS"
 ct_set_persistent_peers "$CONFIG_DIR/config.toml" "$PERSISTENT_PEERS"
 ct_set_moniker          "$CONFIG_DIR/config.toml" "$MONIKER"
 ct_configure_statesync  "$CONFIG_DIR/config.toml" "$STATESYNC_RPC"