Add posts, tags, tagging, to database. Create references to align with new DB model. Add image of mermaid template model.

db/migrate/20250515134517_create_posts.rb

@@ -0,0 +1,14 @@
+class CreatePosts < ActiveRecord::Migration[8.0]
+  def change
+    create_table :posts do |t|
+      t.string :title
+      t.text :content
+      t.boolean :pinned
+      t.references :user, null: false, foreign_key: true
+      t.references :image, null: false, foreign_key: true
+      t.string :type
+
+      t.timestamps
+    end
+  end
+end