refactor: update city sync logic with country and state

- Replace country name lookup with country code lookup
- Replace state name lookup with state code lookup
- Change city creation to ensure country association

This update modifies the existing logic for synchronizing city data to
use country and state codes instead of names. This aids in ensuring
more robust data integrity by relying on unique identifiers.

lib/tasks/sync_geo_data.rake

@@ -161,10 +161,12 @@ namespace :geo do
     count = 1
 
     cities.each do |data|
-      city = City.find_or_initialize_by!(name: data["name"])
+      country = Country.find_by!(code: data["country_code"])
+      state = State.find_by(code: data["state_code"])
 
-      country = Country.find_by(name: data["country_name"])
-      state = State.find_by(name: data["state_name"])
+      city = City.find_or_create_by!(name: data["name"]) do |c|
+        c.country_id = country.id
+      end
 
       puts "Syncing City[#{count}/#{sum}] [#{data["name"]}] Country:[#{country&.name}] "
       count += 1