As title --------- Signed-off-by: Jin Hai <haijin.chn@gmail.com>
### Summary ./ragflow_main --syncer to start file syncer config yaml file has following config ``` file_syncer: max_concurrent_syncs: 4 # concurrent file sync threads sync_interval: 3 # check interval ``` --------- Signed-off-by: Jin Hai <haijin.chn@gmail.com>