fetch user's registration time on import start

app/import_worker.rb

···
 require 'active_record'
+require 'minisky'
+require 'time'
 
 require_relative 'init'
 require_relative 'import_manager'
···
     end
 
     def run(collections)
+      if @user.registered_at.nil?
+        registration_time = get_registration_time(@user)
+        @user.update!(registered_at: registration_time)
+      end
+
       import = ImportManager.new(@user)
       import.report = BasicReport.new if @verbose
       import.start(collections)
+    end
+
+    def get_registration_time(user)
+      profile = Minisky.new('public.api.bsky.app', nil).get_request('app.bsky.actor.getProfile', { actor: user.did })
+      Time.parse(profile['createdAt'])
     end
   end
 

db/migrate/20250923180153_add_user_created_at.rb

···
+class AddUserCreatedAt < ActiveRecord::Migration[7.2]
+  def change
+    add_column :users, :registered_at, :datetime, null: true
+  end
+end

db/schema.rb

···
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[7.2].define(version: 2025_09_23_014702) do
+ActiveRecord::Schema[7.2].define(version: 2025_09_23_180153) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
 
···
 
   create_table "users", id: :serial, force: :cascade do |t|
     t.string "did", limit: 260, null: false
+    t.datetime "registered_at"
     t.index ["did"], name: "index_users_on_did", unique: true
   end
 end