[TC-642] modify template (#3)

https://eva.avroid.tech/desk/Task/TC-642#be-dorabotat-shablon-servisov-backend

Дорабатываем шаблон сервисов по требованиям: https://eva.avroid.tech/project/Document/DOC-002710#trebovanija-k-versijam

Reviewed-on: https://git.avroid.tech/Templates/template-backend-service/pulls/3
Reviewed-by: Victor Stratov <victor.stratov@avroid.team>
Reviewed-by: Petr Brovchenko <petr.brovchenko@avroid.team>
Co-authored-by: Nadezhda <nadezhda.lavrentieva@avroid.team>
Co-committed-by: Nadezhda <nadezhda.lavrentieva@avroid.team>

src/repositories/tables/tables.py

@@ -0,0 +1,9 @@
+from sqlalchemy import Column, Integer, Table
+
+from src.database.postgresql import pg_metadata
+
+todo_table = Table(
+    "todo_table",
+    pg_metadata,
+    Column("id", Integer, primary_key=True),
+)