fix: golangci loopref linter

.golangci.yml

@@ -3,7 +3,7 @@ run:
 linters:
   enable:
     - exhaustive
-    - exportloopref
+    - copyloopvar
     - revive
     - goimports
     - gosec

pkg/solana/config_tracker.go

@@ -31,7 +31,6 @@ func ConfigFromState(ctx context.Context, state State) (types.ContractConfig, er
 		return types.ContractConfig{}, err
 	}
 	for _, o := range oracles {
-		o := o //  https://github.com/golang/go/wiki/CommonMistakes#using-reference-to-loop-iterator-variable
 		pubKeys = append(pubKeys, o.Signer.Key[:])
 		accounts = append(accounts, types.Account(o.Transmitter.String()))
 	}

pkg/solana/report_test.go

@@ -143,7 +143,6 @@ func TestMedianFromReport(t *testing.T) {
 	}
 
 	for _, tc := range tt {
-		tc := tc
 		t.Run(tc.name, func(t *testing.T) {
 			ctx := tests.Context(t)
 			var pos []median.ParsedAttributedObservation

pkg/solana/txm/pendingtx_test.go

@@ -1304,7 +1304,6 @@ func TestPendingTxContext_ListAllExpiredBroadcastedTxs(t *testing.T) {
 	}
 
 	for _, tt := range tests {
-		tt := tt // capture range variable
 		t.Run(tt.name, func(t *testing.T) {
 			// Initialize a new PendingTxContext
 			ctx := newPendingTxContext()