Add search form for hidden content

Added search for comments and proposal_notifications, added tsv column
for search and rake tasks to update/create tsv vector.

db/migrate/20190307113726_add_tsvector_to_comments_and_proposal_notifications.rb

@@ -0,0 +1,9 @@
+class AddTsvectorToCommentsAndProposalNotifications < ActiveRecord::Migration[5.2]
+  def change
+    add_column :comments, :tsv, :tsvector
+    add_index :comments, :tsv, using: "gin"
+
+    add_column :proposal_notifications, :tsv, :tsvector
+    add_index :proposal_notifications, :tsv, using: "gin"
+  end
+end

db/schema.rb

@@ -448,6 +448,7 @@ ActiveRecord::Schema.define(version: 2021_11_03_112944) do
     t.string "ancestry"
     t.integer "confidence_score", default: 0, null: false
     t.boolean "valuation", default: false
+    t.tsvector "tsv"
     t.index ["ancestry"], name: "index_comments_on_ancestry"
     t.index ["cached_votes_down"], name: "index_comments_on_cached_votes_down"
     t.index ["cached_votes_total"], name: "index_comments_on_cached_votes_total"
@@ -455,6 +456,7 @@ ActiveRecord::Schema.define(version: 2021_11_03_112944) do
     t.index ["commentable_id", "commentable_type"], name: "index_comments_on_commentable_id_and_commentable_type"
     t.index ["confidence_score"], name: "index_comments_on_confidence_score"
     t.index ["hidden_at"], name: "index_comments_on_hidden_at"
+    t.index ["tsv"], name: "index_comments_on_tsv", using: :gin
     t.index ["user_id"], name: "index_comments_on_user_id"
     t.index ["valuation"], name: "index_comments_on_valuation"
   end
@@ -1268,6 +1270,8 @@ ActiveRecord::Schema.define(version: 2021_11_03_112944) do
     t.datetime "hidden_at"
     t.datetime "ignored_at"
     t.datetime "confirmed_hide_at"
+    t.tsvector "tsv"
+    t.index ["tsv"], name: "index_proposal_notifications_on_tsv", using: :gin
   end
 
   create_table "proposal_translations", id: :serial, force: :cascade do |t|