plasma: pin trusted bootstrap peers for mainnet observer

Add trusted_peers configuration with observer-cs-1, observer-cs-4,
observer-cs-9 to fix P2P peering issue. Set trusted_only=true.

Generated by Mistral Vibe.
Co-Authored-By: Mistral Vibe <vibe@mistral.ai>

plasma/mainnet/non-validator.toml

@@ -10,7 +10,7 @@ interval = 5
 p2p_port = 34070
 timeout = 5
 identity_file_path = "/consensus/ec-secp256k1-non-validator.der"
-trusted_only = false
+trusted_only = true
 discovery.enabled = true
 
 [api]
@@ -73,3 +73,15 @@ peer_id = "16Uiu2HAmGmnMycTkjnMoxcyVAF8cUFpVoVKKCAGTpwEBJMs181yM"
 api_host = "plasma-mainnet-observer-cs-9.plasmalabs.tech"
 p2p_port = 34070
 peer_id = "16Uiu2HAm2PVfZRoyXXLASVzVX3gyBEQd3mRAzZytjv3esD9kWumD"
+
+[[network.trusted_peers]]
+peer_id = "16Uiu2HAm4WdZmik6PVsRvcbCzc1eHuNfQHgj52CxUAjmdC7W5dXi"
+address = "plasma-mainnet-observer-cs-1.plasmalabs.tech:34070"
+
+[[network.trusted_peers]]
+peer_id = "16Uiu2HAmGmnMycTkjnMoxcyVAF8cUFpVoVKKCAGTpwEBJMs181yM"
+address = "plasma-mainnet-observer-cs-4.plasmalabs.tech:34070"
+
+[[network.trusted_peers]]
+peer_id = "16Uiu2HAm2PVfZRoyXXLASVzVX3gyBEQd3mRAzZytjv3esD9kWumD"
+address = "plasma-mainnet-observer-cs-9.plasmalabs.tech:34070"