Push discovered status through streaming API within a time window (#6484)

Time window of 6 hours

app/models/status.rb

@@ -80,6 +80,8 @@ class Status < ApplicationRecord
 
   delegate :domain, to: :account, prefix: true
 
+  REAL_TIME_WINDOW = 6.hours
+
   def searchable_by(preloaded = nil)
     ids = [account_id]
 
@@ -108,6 +110,10 @@ class Status < ApplicationRecord
     !reblog_of_id.nil?
   end
 
+  def within_realtime_window?
+    created_at >= REAL_TIME_WINDOW.ago
+  end
+
   def verb
     if destroyed?
       :delete