feat(migrate): add AddCoverToPosts, down and CreateComments

examples/blog/db/migrate/20260906000001_add_cover_to_posts.rb

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+class AddCoverToPosts < Prism::Orm::Migration
+  def up
+    add_column :posts, :cover, default: nil
+  end
+
+  def down
+    remove_column :posts, :cover
+  end
+end

examples/blog/db/migrate/20260906000002_create_comments.rb

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+class CreateComments < Prism::Orm::Migration
+  def up
+    create_table :comments do |t|
+      t.integer :post_id
+      t.string :author
+      t.text :body
+      t.timestamps
+    end
+  end
+
+  def down
+    drop_table :comments
+  end
+end

examples/blog/db/migrate/20260906000003_create_users.rb

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+class CreateUsers < Prism::Orm::Migration
+  def up
+    create_table :users do |t|
+      t.string :email
+      t.string :password_digest
+      t.timestamps
+    end
+  end
+
+  def down
+    drop_table :users
+  end
+end

examples/blog/db/migrate/20260906000004_add_user_id_to_posts_and_comments.rb

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+class AddUserIdToPostsAndComments < Prism::Orm::Migration
+  def up
+    add_column :posts, :user_id
+    add_column :comments, :user_id
+  end
+
+  def down
+    remove_column :posts, :user_id
+    remove_column :comments, :user_id
+  end
+end

examples/blog/db/migrate/20260906000005_add_lock_version_to_posts.rb

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+class AddLockVersionToPosts < Prism::Orm::Migration
+  def up
+    add_column :posts, :lock_version, :integer, default: 0
+  end
+
+  def down
+    remove_column :posts, :lock_version
+  end
+end

examples/blog/db/migrate/20260906000006_add_lock_version_to_comments.rb

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+class AddLockVersionToComments < Prism::Orm::Migration
+  def up
+    add_column :comments, :lock_version, :integer, default: 0
+  end
+
+  def down
+    remove_column :comments, :lock_version
+  end
+end

examples/blog/db/migrate/20260906000007_create_likes.rb

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+class CreateLikes < Prism::Orm::Migration
+  def up
+    create_table :likes do |t|
+      t.integer :user_id
+      t.integer :likeable_id
+      t.string :likeable_type
+      t.timestamps
+    end
+  end
+
+  def down
+    drop_table :likes
+  end
+end

examples/blog/db/migrate/20260906000008_add_comments_count_to_posts.rb

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+class AddCommentsCountToPosts < Prism::Orm::Migration
+  def up
+    add_column :posts, :comments_count, :integer, default: 0
+  end
+
+  def down
+    remove_column :posts, :comments_count
+  end
+end

examples/blog/db/migrate/20260906000009_add_status_to_posts.rb

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+class AddStatusToPosts < Prism::Orm::Migration
+  def up
+    add_column :posts, :status, :integer, default: 0
+  end
+
+  def down
+    remove_column :posts, :status
+  end
+end

examples/blog/db/migrate/20260906000010_add_status_to_comments.rb

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+class AddStatusToComments < Prism::Orm::Migration
+  def up
+    add_column :comments, :status, :integer, default: 0
+  end
+
+  def down
+    remove_column :comments, :status
+  end
+end

examples/blog/db/migrate/20260906000011_add_deleted_at_to_posts.rb

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+class AddDeletedAtToPosts < Prism::Orm::Migration
+  def up
+    add_column :posts, :deleted_at, :datetime, default: nil
+  end
+
+  def down
+    remove_column :posts, :deleted_at
+  end
+end

examples/blog/db/migrate/20260906000012_add_deleted_at_to_comments_and_likes.rb

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+class AddDeletedAtToCommentsAndLikes < Prism::Orm::Migration
+  def up
+    add_column :comments, :deleted_at, :datetime, default: nil
+    add_column :likes, :deleted_at, :datetime, default: nil
+  end
+
+  def down
+    remove_column :comments, :deleted_at
+    remove_column :likes, :deleted_at
+  end
+end