Rename "columns" in db to "keys"

"Columns" is misleading because it implies that every field of the table
ought to be specified, which is contrary to how NoSQL databases work.

store/app/api/crud/base.py

@@ -32,13 +32,13 @@ async def __aexit__(self, exc_type: Any, exc_val: Any, exc_tb: Any) -> None:  #
     async def _create_dynamodb_table(
         self,
         name: str,
-        columns: list[tuple[str, Literal["S", "N", "B"], Literal["HASH", "RANGE"]]],
+        keys: list[tuple[str, Literal["S", "N", "B"], Literal["HASH", "RANGE"]]],
         deletion_protection: bool = False,
     ) -> None:
         table = await self.db.create_table(
-            AttributeDefinitions=[{"AttributeName": n, "AttributeType": t} for n, t, _ in columns],
+            AttributeDefinitions=[{"AttributeName": n, "AttributeType": t} for n, t, _ in keys],
             TableName=name,
-            KeySchema=[{"AttributeName": n, "KeyType": t} for n, _, t in columns],
+            KeySchema=[{"AttributeName": n, "KeyType": t} for n, _, t in keys],
             DeletionProtectionEnabled=deletion_protection,
             BillingMode="PAY_PER_REQUEST",
         )

store/app/api/db.py

@@ -33,19 +33,19 @@ async def create_tables(crud: Crud | None = None) -> None:
         await asyncio.gather(
             crud._create_dynamodb_table(
                 name="Users",
-                columns=[
+                keys=[
                     ("id", "S", "HASH"),
                 ],
             ),
             crud._create_dynamodb_table(
                 name="Tokens",
-                columns=[
+                keys=[
                     ("id", "S", "HASH"),
                 ],
             ),
             crud._create_dynamodb_table(
                 name="Robots",
-                columns=[
+                keys=[
                     ("id", "S", "HASH"),
                 ]
             )