ios, core: better notifications processing to avoid contention for database (#3485)

* core: forward notifications about message processing (for iOS notifications)

* simplexmq

* the option to keep database key, to allow re-opening the database

* export new init with keepKey and reopen DB api

* stop remote ctrl when suspending chat

* ios: close/re-open db on suspend/activate

* allow activating chat without restoring (for NSE)

* update NSE to suspend/activate (does not work)

* simplexmq

* suspend chat and close database when last notification in the process is processed

* stop reading notifications on message markers

* replace async stream with cancellable concurrent queue

* better synchronization of app and NSE

* remove outside of task

* remove unused var

* whitespace

* more debug logging, handle cancelled read after dequeue

* comments

* more comments

tests/SchemaDump.hs

@@ -36,14 +36,14 @@ testVerifySchemaDump :: IO ()
 testVerifySchemaDump = withTmpFiles $ do
   savedSchema <- ifM (doesFileExist appSchema) (readFile appSchema) (pure "")
   savedSchema `deepseq` pure ()
-  void $ createChatStore testDB "" MCError
+  void $ createChatStore testDB "" False MCError
   getSchema testDB appSchema `shouldReturn` savedSchema
   removeFile testDB
 
 testSchemaMigrations :: IO ()
 testSchemaMigrations = withTmpFiles $ do
   let noDownMigrations = dropWhileEnd (\Migration {down} -> isJust down) Store.migrations
-  Right st <- createSQLiteStore testDB "" noDownMigrations MCError
+  Right st <- createSQLiteStore testDB "" False noDownMigrations MCError
   mapM_ (testDownMigration st) $ drop (length noDownMigrations) Store.migrations
   closeSQLiteStore st
   removeFile testDB