Publish history index

This also adds a call to publishing-api which overrides the publishing
app's path reservation for the base_path. The reservation is overwritten and
updated so the publishing app is government-frontend.

lib/publish_static_pages.rb

@@ -35,11 +35,20 @@ module PublishStaticPages
       template: "histories/lancaster_house",
       base_path: "/government/history/lancaster-house",
     },
+    {
+      content_id: "db95a864-874f-4f50-a483-352a5bc7ba18",
+      title: "History of the UK government",
+      description: "In this section you can read short biographies of notable people and explore the history of government buildings. You can also search our online records and read articles and blog posts by historians.",
+      template: "histories/history",
+      base_path: "/government/history",
+    },
   ].freeze
 
   def self.publish_all
     PAGES.each do |page|
       payload = present_for_publishing_api(page)
+
+      Services.publishing_api.put_path(page[:base_path], publishing_app: "government-frontend", override_existing: true)
       Services.publishing_api.put_content(payload[:content_id], payload[:content])
       Services.publishing_api.publish(payload[:content_id], nil, locale: "en")
     end

test/unit/publish_static_pages_test.rb

@@ -16,6 +16,9 @@ class PublishStaticPagesTest < ActiveSupport::TestCase
 
   def expect_publishing(pages)
     pages.each do |page|
+      Services.publishing_api.expects(:put_path)
+        .with(page[:base_path], publishing_app: "government-frontend", override_existing: true)
+
       Services.publishing_api.expects(:put_content)
         .with(
           page[:content_id],