Apply the same url normalisation to embed_urls inserted in the PostCreator (#30641)

lib/post_creator.rb

@@ -405,7 +405,7 @@ class PostCreator
       TopicEmbed.new(
         topic_id: @post.topic_id,
         post_id: @post.id,
-        embed_url: @opts[:embed_url],
+        embed_url: TopicEmbed.normalize_url(@opts[:embed_url]),
         content_sha1: @opts[:embed_content_sha1],
       )
     rollback_from_errors!(embed) unless embed.save

spec/lib/post_creator_spec.rb

@@ -1512,6 +1512,20 @@ RSpec.describe PostCreator do
         expect(post.topic).not_to be_visible
       end
     end
+
+    it "normalizes the embed url" do
+      embed_url = "http://eviltrout.com/stupid-url/"
+      creator =
+        PostCreator.new(
+          user,
+          embed_url: embed_url,
+          title: "Reviews of Science Ovens",
+          raw: "Did you know that you can use microwaves to cook your dinner? Science!",
+        )
+      creator.create
+      expect(creator.errors).to be_blank
+      expect(TopicEmbed.where(embed_url: "http://eviltrout.com/stupid-url").exists?).to eq(true)
+    end
   end
 
   describe "read credit for creator" do