Setup solid queue for job processing (#19)

Reviewed-on: #19

db/migrate/20240727002531_create_recurring_executions.solid_queue.rb

@@ -0,0 +1,15 @@
+# This migration comes from solid_queue (originally 20240218110712)
+class CreateRecurringExecutions < ActiveRecord::Migration[7.1]
+  def change
+    create_table :solid_queue_recurring_executions do |t|
+      t.references :job, index: { unique: true }, null: false
+      t.string :task_key, null: false
+      t.datetime :run_at, null: false
+      t.datetime :created_at, null: false
+
+      t.index [ :task_key, :run_at ], unique: true
+    end
+
+    add_foreign_key :solid_queue_recurring_executions, :solid_queue_jobs, column: :job_id, on_delete: :cascade
+  end
+end