fix: commit after app install

Since we destroy the connection after app installation,
mariadb implicitly rollsback the transaction hence committing upon successfull
app installation to prevent data sync loss

(cherry picked from commit 3539dacdf0)

frappe/commands/site.py

@@ -420,6 +420,9 @@ def install_app(context, apps, force=False):
 				print(f"An error occurred while installing {app}{err_msg}")
 				exit_code = 1
 
+		if not exit_code:
+			frappe.db.commit()
+
 		frappe.destroy()
 
 	sys.exit(exit_code)

frappe/utils/fixtures.py

@@ -25,8 +25,6 @@ def sync_fixtures(app=None):
 
 	frappe.flags.in_fixtures = False
 
-	frappe.db.commit()
-
 
 def import_custom_scripts(app):
 	"""Import custom scripts from `[app]/fixtures/custom_scripts`"""