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/reading_list_specifics.proto

@@ -0,0 +1,43 @@
+// Copyright 2016 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;
+
+// Sync Reading list entry. This proto contains the fields synced for a reading
+// list entry. It must be kept synced with the reading_list.ReadingListLocal
+// protobuf.
+message ReadingListSpecifics {
+  // entry_id and url must be equal.
+  optional string entry_id = 1;
+  optional string title = 2;
+  optional string url = 3;
+  optional int64 creation_time_us = 4;
+  optional int64 update_time_us = 5;
+  optional int64 first_read_time_us = 7;
+  optional int64 update_title_time_us = 8;
+  optional int32 estimated_read_time_seconds = 9;
+
+  enum ReadingListEntryStatus {
+    UNREAD = 0;
+    READ = 1;
+    UNSEEN = 2;
+  }
+
+  // If the field is not present, it defaults to UNSEEN.
+  optional ReadingListEntryStatus status = 6;
+}