Remove IP tracking columns from users table (#16409)

db/schema.rb

@@ -923,8 +923,6 @@ ActiveRecord::Schema.define(version: 2021_12_13_040746) do
     t.integer "sign_in_count", default: 0, null: false
     t.datetime "current_sign_in_at"
     t.datetime "last_sign_in_at"
-    t.inet "current_sign_in_ip"
-    t.inet "last_sign_in_ip"
     t.boolean "admin", default: false, null: false
     t.string "confirmation_token"
     t.datetime "confirmed_at"
@@ -1120,6 +1118,28 @@ ActiveRecord::Schema.define(version: 2021_12_13_040746) do
   SQL
   add_index "instances", ["domain"], name: "index_instances_on_domain", unique: true
 
+  create_view "user_ips", sql_definition: <<-SQL
+      SELECT t0.user_id,
+      t0.ip,
+      max(t0.used_at) AS used_at
+     FROM ( SELECT users.id AS user_id,
+              users.sign_up_ip AS ip,
+              users.created_at AS used_at
+             FROM users
+            WHERE (users.sign_up_ip IS NOT NULL)
+          UNION ALL
+           SELECT session_activations.user_id,
+              session_activations.ip,
+              session_activations.updated_at
+             FROM session_activations
+          UNION ALL
+           SELECT login_activities.user_id,
+              login_activities.ip,
+              login_activities.created_at
+             FROM login_activities
+            WHERE (login_activities.success = true)) t0
+    GROUP BY t0.user_id, t0.ip;
+  SQL
   create_view "account_summaries", materialized: true, sql_definition: <<-SQL
       SELECT accounts.id AS account_id,
       mode() WITHIN GROUP (ORDER BY t0.language) AS language,