Create names for columns

Addresses #17 but it feels like we should have these definitions
in the dbConfig.  Which leads to the question of moving from
QtSql to Pony ORM

docketModel.py

@@ -1,10 +1,9 @@
-import datetime
-from typing import Any, cast
+import enum
+from typing import Any
 
 from PySide6.QtCore import (
     QAbstractTableModel,
     QDate,
-    QDateTime,
     QModelIndex,
     QPersistentModelIndex,
     Qt,
@@ -18,6 +17,10 @@ from lib.utils import query_error
 class docketModel(QAbstractTableModel):
     entries: list[list[str | None]] = []
 
+    class ColumnNames(enum.IntEnum):
+        date = 0
+        text = 1
+
     def __init__(self, case_id: int | None = None) -> None:
         super(docketModel, self).__init__()
         if case_id == None: