title: Rails 7.0 schema has arbitrary precision: 6 added on my timestamps
body: <p>I am working on a new rails app, when I am running the migrations the schema.rb is changing, a new param precision is added to my timestamps.</p>
  <p>Where does this precision new param comes from?</p>
  <pre><code>t.datetime &quot;created_at&quot;, precision: 6, null: false
  </code></pre>