feat: user sync stream (#16862)

* refactor: user entity

* chore: rebase fixes

* refactor: remove int user Id

* refactor: migrate store userId from int to string

* refactor: rename uid to id

* feat: drift

* pr feedback

* refactor: move common overrides to mixin

* refactor: remove int user Id

* refactor: migrate store userId from int to string

* refactor: rename uid to id

* feat: user & partner sync stream

* pr changes

* refactor: sync service and add tests

* chore: remove generated change

* chore: move sync model

* rebase: convert string ids to byte uuids

* rebase

* add processing logs

* batch db calls

* rewrite isolate manager

* rewrite with worker_manager

* misc fixes

* add sync order test

---------

Co-authored-by: shenlong-tanwen <139912620+shalong-tanwen@users.noreply.github.com>
Co-authored-by: Alex <alex.tran1502@gmail.com>

mobile/lib/constants/constants.dart

@@ -5,5 +5,9 @@ const double downloadFailed = -2;
 // Number of log entries to retain on app start
 const int kLogTruncateLimit = 250;
 
+// Sync
+const int kSyncEventBatchSize = 5000;
+
+// Hash batch limits
 const int kBatchHashFileLimit = 128;
 const int kBatchHashSizeLimit = 1024 * 1024 * 1024; // 1GB