Remove upper-binding for SQLAlchemy

There was a problem with custom classes for SQLAlchemy that
prevented it to work on MySQL. This PR removes the SQLAlchemy
upper binding.

This has been added as an issue in:

sqlalchemy/sqlalchemy#7660

But apparently it's been fixed in one of the more recent SQLAlchemy
releases.

setup.cfg

@@ -142,11 +142,7 @@ install_requires =
     rich>=12.4.4
     rich-click>=1.3.1
     setproctitle>=1.1.8
-    # SQL Alchemy 1.4.10 introduces a bug where for PyODBC driver UTCDateTime fields get wrongly converted
-    # as string and fail to be converted back to datetime. It was supposed to be fixed in
-    # https://github.com/sqlalchemy/sqlalchemy/issues/6366 (released in 1.4.12) but apparently our case
-    # is different. Opened https://github.com/sqlalchemy/sqlalchemy/issues/7660 to track it
-    sqlalchemy>=1.4,<1.4.10
+    sqlalchemy>=1.4
     sqlalchemy_jsonfield>=1.0
     tabulate>=0.7.5
     tenacity>=6.2.0

tests/utils/test_db.py

@@ -73,6 +73,9 @@ def test_database_schema_and_sqlalchemy_model_are_in_sync(self):
             lambda t: (t[0] == 'remove_table' and t[1].name == 'spt_fallback_usg'),
             lambda t: (t[0] == 'remove_table' and t[1].name == 'MSreplication_options'),
             lambda t: (t[0] == 'remove_table' and t[1].name == 'spt_fallback_dev'),
+            # MSSQL foreign keys where CASCADE has been removed
+            lambda t: (t[0] == 'remove_fk' and t[1].name == 'task_reschedule_dr_fkey'),
+            lambda t: (t[0] == 'add_fk' and t[1].name == 'task_reschedule_dr_fkey'),
             # Ignore flask-session table/index
             lambda t: (t[0] == 'remove_table' and t[1].name == 'session'),
             lambda t: (t[0] == 'remove_index' and t[1].name == 'session_id'),