fix(Dr. Rai Reports): Bugs with Titration Data tools (#5652)

**Story card:**
[sc-16391](https://app.shortcut.com/simpledotorg/story/16391/optimize-data-load-for-titration-indicator)

## Because

Running this in SBX showed some errors

## This addresses

Minor bug fixes

## Test instructions

n.a

Author: igbanam

app/services/dr_rai/data_service.rb

@@ -4,7 +4,7 @@ class << self
       def populate klazz, timeline: nil
         raise "Can only populate models" unless klazz < ApplicationRecord
         if timeline.present?
-          raise "timeline must be Date range" unless timelines.is_a?(Range)
+          raise "timeline must be Date range" unless timeline.is_a?(Range)
         end
         new(klazz, timeline).populate!
       end

lib/tasks/dr_rai.rake

@@ -1,11 +1,11 @@
 namespace :dr_rai do
   desc "Populate Titration Data"
-  task :populate_titration_data, [:from_date, :to_date] => :environment do
+  task :populate_titration_data, [:from_date, :to_date] => :environment do |_, args|
     args.with_defaults(from_date: 1.year.ago.to_date, to_date: Date.today)
     puts "Attempting to populate Dr. Rai titration data"
     from_date = Date.parse(args[:from_date])
     to_date = Date.parse(args[:to_date])
-    DrRai::DataService.populate(DrRai::Data::Titration, from_date..to_date)
+    DrRai::DataService.populate(DrRai::Data::Titration, timeline: from_date..to_date)
     puts "Done populating Dr. Rai Titration data"
   end
 end