feat: added cache versioning to sql for geo invalidation

backend/src/db/migrations/20250908193226_sql-cache_int.ts

@@ -0,0 +1,17 @@
+import { Knex } from "knex";
+
+import { TableName } from "../schemas";
+
+export async function up(knex: Knex): Promise<void> {
+  if (!(await knex.schema.hasTable(TableName.KeyValueStore))) {
+    await knex.schema.createTable(TableName.KeyValueStore, (t) => {
+      t.text("key").primary();
+      t.bigint("integerValue");
+      t.datetime("expiresAt");
+    });
+  }
+}
+
+export async function down(knex: Knex): Promise<void> {
+  await knex.schema.dropTableIfExists(TableName.KeyValueStore);
+}