auto/terraform: typing hints for base terraform module

app/terraform/proxy/__init__.py

@@ -3,6 +3,7 @@ import datetime
 import math
 import string
 import random
+from typing import Dict
 
 from sqlalchemy import text
 from tldextract import tldextract
@@ -17,7 +18,7 @@ from app.terraform.terraform import TerraformAutomation
 class ProxyAutomation(TerraformAutomation):
     subgroup_max = math.inf
 
-    def get_subgroups(self):
+    def get_subgroups(self) -> Dict[int, Dict[int, int]]:
         conn = db.engine.connect()
         result = conn.execute(text("""
         SELECT origin.group_id, proxy.psg, COUNT(proxy.id) FROM proxy, origin