fix(testnet): add testnet seed nodes for peer discovery

Enable peer discovery on testnet by adding seed nodes and preserving vFixedSeeds. This ensures nodes can connect to the network during initial sync.

src/chainparams.cpp

@@ -231,9 +231,10 @@ public:
         assert(consensus.hashGenesisBlock == uint256S("0x000000000933ea01ad0ee984209779baaec3ced90fa3f408719526f8d77f4943"));
         assert(genesis.hashMerkleRoot == uint256S("0x4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"));
 
-        vFixedSeeds.clear();
         vSeeds.clear();
-       
+        // Note: vFixedSeeds is not cleared for testnet to allow peer discovery
+
+        vFixedSeeds = std::vector<SeedSpec6>(pnSeed6_test, pnSeed6_test + ARRAYLEN(pnSeed6_test));
 
         base58Prefixes[PUBKEY_ADDRESS] = std::vector<unsigned char>(1,127);
         base58Prefixes[SCRIPT_ADDRESS] = std::vector<unsigned char>(1,115);