title: adding the median as text to plotly express px.box facets
body: <p>How would I add the median values for each of the 3 target categories and each of the 4 faceted subplots? I would like to add the values at the bottom of the subplots or to right of the boxes.</p>
  <pre class="lang-py prettyprint-override"><code>from sklearn.datasets import load_iris
  import pandas as pd
  import plotly.express as px
  
  data = load_iris(as_frame=True)
  df = data.data.assign(target=data.target)
  
  melted_df = df.melt(id_vars='target')
  
  px.box(melted_df, x='target', y='value', facet_col='variable', height=500)
  
  </code></pre>
  <p><a href="https://i.stack.imgur.com/3N3w6.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/3N3w6.png" alt="enter image description here" /></a></p>