Changed fsearch functionality for tree_number arg
Changed fsearch functionality for tree_number arg

- Moved tree url fetch functionality to a new endpoint
- Changed fsearch functionality to filter results by tree_number if the arg is present

Beit-Hatfutsot/dbs-back,Beit-Hatfutsot/dbs-back,Beit-Hatfutsot/dbs-back,Beit-Hatfutsot/dbs-back