add analytics-powered 404 monitoring with FTS5 auto-resolve

BrokenUrlTracker now queries real analytics pageview counts instead of
hardcoding 0, so broken URLs with prior traffic are distinguished from
bot noise. For /products/ 404s with a single FTS5 search match, auto-
creates a redirect and marks the broken URL resolved. 1232 tests.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

test/berrypod/analytics_test.exs

@@ -366,6 +366,23 @@ defmodule Berrypod.AnalyticsTest do
     end
   end
 
+  describe "count_pageviews_for_path/1" do
+    test "counts all pageviews for a specific path" do
+      v1 = :crypto.strong_rand_bytes(8)
+      v2 = :crypto.strong_rand_bytes(8)
+
+      insert_event(%{visitor_hash: v1, pathname: "/products/classic-tee"})
+      insert_event(%{visitor_hash: v2, pathname: "/products/classic-tee"})
+      insert_event(%{visitor_hash: v1, pathname: "/products/other"})
+
+      assert Analytics.count_pageviews_for_path("/products/classic-tee") == 2
+    end
+
+    test "returns 0 for paths with no history" do
+      assert Analytics.count_pageviews_for_path("/products/never-visited") == 0
+    end
+  end
+
   describe "delete_events_before/1" do
     test "deletes old events" do
       old = DateTime.add(DateTime.utc_now(), -400, :day) |> DateTime.truncate(:second)

test/berrypod/redirects_integration_test.exs

@@ -1,7 +1,8 @@
 defmodule Berrypod.RedirectsIntegrationTest do
-  use Berrypod.DataCase, async: true
+  # async: false because FTS5 search index is shared state
+  use Berrypod.DataCase, async: false
 
-  alias Berrypod.{Products, Redirects}
+  alias Berrypod.{Products, Redirects, Search}
   import Berrypod.ProductsFixtures
 
   setup do
@@ -88,4 +89,45 @@ defmodule Berrypod.RedirectsIntegrationTest do
                Redirects.lookup("/products/#{product.slug}")
     end
   end
+
+  describe "attempt_auto_resolve/1" do
+    test "creates redirect when FTS5 finds a single match" do
+      # Product was renamed: "Classic Tee" -> "Classic Tee V2"
+      # Old slug was "classic-tee", new slug is "classic-tee-v2"
+      product =
+        product_fixture(%{
+          title: "Classic Tee V2",
+          slug: "classic-tee-v2",
+          category: "T-Shirts",
+          visible: true,
+          status: "active"
+        })
+
+      product_variant_fixture(%{product: product, title: "Medium / Black", price: 2500})
+      Search.rebuild_index()
+
+      # Record a broken URL for the old slug
+      {:ok, _} = Redirects.record_broken_url("/products/classic-tee", 10)
+
+      assert :resolved = Redirects.attempt_auto_resolve("/products/classic-tee")
+
+      # Redirect should point to the matched product
+      assert {:ok, %{to_path: "/products/classic-tee-v2"}} =
+               Redirects.lookup("/products/classic-tee")
+
+      # Broken URL should be marked resolved
+      assert Redirects.list_broken_urls("pending") == []
+    end
+
+    test "returns :no_match when no search results" do
+      Search.rebuild_index()
+
+      assert :no_match = Redirects.attempt_auto_resolve("/products/totally-unique-nonexistent")
+    end
+
+    test "returns :no_match for non-product paths" do
+      assert :no_match = Redirects.attempt_auto_resolve("/about")
+      assert :no_match = Redirects.attempt_auto_resolve("/collections/old-category")
+    end
+  end
 end