Add copyright notices

Author: qdm12

.github/CONTRIBUTING.md

@@ -50,7 +50,7 @@ Mocks are auto-generated using [mockgen](https://pkg.go.dev/go.uber.org/mock/moc
   * if the file `mocks_generate_test.go` does not exist in the package where the interface is located, create it with content (adapt as needed):
 
     ```go
-    // Copyright (C) 2019-2025, Ava Labs, Inc. All rights reserved.
+    // Copyright (C) 2025-2025, Ava Labs, Inc. All rights reserved.
     // See the file LICENSE for licensing terms.
 
     package mypackage

precompile/contract/mocks_generate_test.go

@@ -1,3 +1,6 @@
+// Copyright (C) 2025, Ava Labs, Inc. All rights reserved.
+// See the file LICENSE for licensing terms.
+
 package contract
 
 //go:generate go run go.uber.org/mock/mockgen -package=$GOPACKAGE -destination=mocks.go . BlockContext,AccessibleState,StateDB

precompile/precompileconfig/mocks_generate_test.go

@@ -1,3 +1,6 @@
+// Copyright (C) 2025, Ava Labs, Inc. All rights reserved.
+// See the file LICENSE for licensing terms.
+
 package precompileconfig
 
 //go:generate go run go.uber.org/mock/mockgen -package=$GOPACKAGE -destination=mocks.go . Predicater,Config,ChainConfig,Accepter

warp/aggregator/mocks_generate_test.go

@@ -1,3 +1,6 @@
+// Copyright (C) 2025, Ava Labs, Inc. All rights reserved.
+// See the file LICENSE for licensing terms.
+
 package aggregator
 
 //go:generate go run go.uber.org/mock/mockgen -package=$GOPACKAGE -source=signature_getter.go -destination=mock_signature_getter.go