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/send_tab_to_self_specifics.proto

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+// Copyright 2018 The Chromium Authors
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// Sync protocol datatype extension for the reading list items.
+
+// 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;
+
+// Send Tab To Self list entry. This proto contains the fields synced to send
+// a url across devices.
+message SendTabToSelfSpecifics {
+  // A random unique identifier for each shared tab.
+  // Required.
+  optional string guid = 5;
+  // The name of the tab being shared.
+  optional string title = 1;
+  // The URL of the tab being shared.
+  // Required.
+  optional string url = 2;
+  // The time the tab was shared as measured by the client in microseconds since
+  // the windows epoch.
+  optional int64 shared_time_usec = 3;
+  // A non-unique but human readable name to describe this client, used in UI.
+  optional string device_name = 4;
+  // The stable Device_id of the device that this tab was shared with.
+  // Required.
+  optional string target_device_sync_cache_guid = 7;
+  // A boolean to designate if the shared tab been opened on the target device.
+  optional bool opened = 8;
+  // Whether the notification for this proto been dismissed.
+  optional bool notification_dismissed = 9;
+
+  reserved "navigation_time_usec";
+  reserved 6;
+}