aptos proto: add ledger_version to ViewRequest (#310)

* aptos proto: add ledger_version to ViewRequest

* Auto-fix: buf format, gofmt, go generate, go mod tidy

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Co-authored-by: app-token-issuer-engops[bot] <144731339+app-token-issuer-engops[bot]@users.noreply.github.com>

Author: cawthorne

cre/capabilities/blockchain/aptos/v1alpha/client.proto

@@ -25,6 +25,7 @@ message AccountAPTBalanceReply {
 
 message ViewRequest {
   ViewPayload payload = 1;
+  optional uint64 ledger_version = 2; // nil means use latest ledger version
 }
 
 message ViewReply {