Port Brave Sync server to Rust

Use SQLite for persistence and generate Rust protobuf bindings at build time.

Add Docker image support for containerized deployment.

Co-Authored-By: codex <[email protected]>

schema/protobuf/sync_pb/autofill_wallet_credential_specifics.proto

@@ -0,0 +1,29 @@
+// Copyright 2023 The Chromium Authors
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// If you change or add any fields in this file, update proto_visitors.h and
+// potentially proto_enum_conversions.{h, cc}.
+
+syntax = "proto2";
+
+option go_package = "./sync_pb";
+
+option java_multiple_files = true;
+option java_package = "org.chromium.components.sync.protocol";
+
+option optimize_for = LITE_RUNTIME;
+
+package sync_pb;
+
+// Autofill wallet data which stores the relevant card credential data.
+message AutofillWalletCredentialSpecifics {
+  // A server-generated unique ID for the instrument/card.
+  optional string instrument_id = 1;
+
+  // A 3 or 4 digit card verification code.
+  optional string cvc = 2;
+
+  // The timestamp of the last update. Used to determine data freshness.
+  optional int64 last_updated_time_unix_epoch_millis = 3;
+}