Fix DB query timeout in Duplicate SSN Report (#11284)

* Slice up the list instead of one giant query

- Follow-up, similar to #9818

changelog: Internal, Reporting, Fix database query timeout in report

app/jobs/reports/duplicate_ssn_report.rb

@@ -38,10 +38,12 @@ def report_body
 
       ssn_signatures = todays_profiles.map(&:ssn_signature).uniq
 
-      profiles_connected_by_ssn = Profile.
-        includes(:user).
-        where(ssn_signature: ssn_signatures).
-        to_a
+      profiles_connected_by_ssn = ssn_signatures.each_slice(1000).flat_map do |ssn_signature_slice|
+        Profile.
+          includes(:user).
+          where(ssn_signature: ssn_signature_slice).
+          to_a
+      end
 
       profiles_connected_by_ssn.sort_by!(&:id).reverse!