Add contestant categories to contests

db/migrate/20250714115208_create_categories.rb

@@ -0,0 +1,15 @@
+class CreateCategories < ActiveRecord::Migration[8.0]
+  def change
+    create_table :categories do |t|
+      t.string :name
+      t.belongs_to :contest, null: false, foreign_key: true
+
+      t.timestamps
+    end
+
+    create_join_table :categories, :contestants do |t|
+      t.index :category_id
+      t.index :contestant_id
+    end
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[8.0].define(version: 2025_06_27_070407) do
+ActiveRecord::Schema[8.0].define(version: 2025_07_14_115208) do
   create_table "active_storage_attachments", force: :cascade do |t|
     t.string "name", null: false
     t.string "record_type", null: false
@@ -39,6 +39,21 @@ ActiveRecord::Schema[8.0].define(version: 2025_06_27_070407) do
     t.index ["blob_id", "variation_digest"], name: "index_active_storage_variant_records_uniqueness", unique: true
   end
 
+  create_table "categories", force: :cascade do |t|
+    t.string "name"
+    t.integer "contest_id", null: false
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+    t.index ["contest_id"], name: "index_categories_on_contest_id"
+  end
+
+  create_table "categories_contestants", id: false, force: :cascade do |t|
+    t.integer "category_id", null: false
+    t.integer "contestant_id", null: false
+    t.index ["category_id"], name: "index_categories_contestants_on_category_id"
+    t.index ["contestant_id"], name: "index_categories_contestants_on_contestant_id"
+  end
+
   create_table "completions", force: :cascade do |t|
     t.integer "time_seconds"
     t.integer "contestant_id", null: false
@@ -141,6 +156,7 @@ ActiveRecord::Schema[8.0].define(version: 2025_06_27_070407) do
 
   add_foreign_key "active_storage_attachments", "active_storage_blobs", column: "blob_id"
   add_foreign_key "active_storage_variant_records", "active_storage_blobs", column: "blob_id"
+  add_foreign_key "categories", "contests"
   add_foreign_key "completions", "contestants"
   add_foreign_key "completions", "contests"
   add_foreign_key "completions", "messages"