EVMAddr (Go) + UTXOAddr (Go) — pure chain-model naming, no eth/lux branding

Renames Go struct field ETHAddr → EVMAddr across types.go, keys.go,
allocations.go, validator_keys.go, config.go, builder/builder.go,
cmd/genesis, cmd/checkkeys. JSON tags stayed evmAddr already (from
v1.12.6). Result: matched pair EVMAddr+UTXOAddr on both Go and JSON
sides.

Kept ParseETHAddress as the input-parsing function name — it describes
what it parses (an Ethereum-format hex address), not the field it
populates (an EVMAddr).

LLM.md updated to state the canonical pair plainly; no rename history.

cmd/checkkeys/main.go

@@ -36,7 +36,7 @@ func main() {
 	}
 
 	for i, key := range keys {
-		ethHex := fmt.Sprintf("%x", key.ETHAddr[:])
+		ethHex := fmt.Sprintf("%x", key.EVMAddr[:])
 		match := ""
 		for addr, label := range genesisETH {
 			if ethHex == addr {
@@ -44,6 +44,6 @@ func main() {
 				break
 			}
 		}
-		fmt.Printf("BIP44 index %d: ETH=0x%x NodeID=%s%s\n", i, key.ETHAddr[:], key.NodeID, match)
+		fmt.Printf("BIP44 index %d: ETH=0x%x NodeID=%s%s\n", i, key.EVMAddr[:], key.NodeID, match)
 	}
 }

cmd/genesis/main.go

@@ -246,7 +246,7 @@ func addBIP44WalletAllocations(config *genesis.Config, networkID uint32, numKeys
 	balanceHex := fmt.Sprintf("0x%x", balance)
 	for _, a := range allocs {
 		// 20-byte ETH addr in checksummed 0x form.
-		addrHex := fmt.Sprintf("0x%s", a.ETHAddr.Hex())
+		addrHex := fmt.Sprintf("0x%s", a.EVMAddr.Hex())
 		alloc[addrHex] = map[string]any{"balance": balanceHex}
 	}
 	out, err := json.Marshal(cchain)