dbprune: add more logs

Pruning can go on for a long time; give admins some insight into that
something is happening to make it less frustrating and to make it easier
which part of the process is stalled should this happen.

Again most of the changes are merely reindents;
review with whitespace changes hidden recommended.

lib/mix/tasks/pleroma/database.ex

@@ -68,6 +68,8 @@ def prune_orphaned_activities(limit \\ 0) when is_number(limit) do
       """
       |> Repo.query([], timeout: :infinity)
 
+    Logger.info("Prune activity singles: deleted #{del_single} rows...")
+
     # Prune activities who link to an array of objects
     {:ok, %{:num_rows => del_array}} =
       """
@@ -88,6 +90,8 @@ def prune_orphaned_activities(limit \\ 0) when is_number(limit) do
       """
       |> Repo.query([], timeout: :infinity)
 
+    Logger.info("Prune activity arrays: deleted #{del_array} rows...")
+
     del_single + del_array
   end
 
@@ -222,6 +226,7 @@ def run(["prune_objects" | args]) do
 
     Logger.info(log_message)
 
+    {del_obj, _} =
       if Keyword.get(options, :keep_threads) do
         # We want to delete objects from threads where
         # 1. the newest post is still old
@@ -288,9 +293,12 @@ def run(["prune_objects" | args]) do
       end
       |> Repo.delete_all(timeout: :infinity)
 
+    Logger.info("Deleted #{del_obj} objects...")
+
     if !Keyword.get(options, :keep_threads) do
       # Without the --keep-threads option, it's possible that bookmarked
       # objects have been deleted. We remove the corresponding bookmarks.
+      {:ok, %{:num_rows => del_bookmarks}} =
         """
         delete from public.bookmarks
         where id in (
@@ -301,12 +309,16 @@ def run(["prune_objects" | args]) do
         )
         """
         |> Repo.query([], timeout: :infinity)
+
+      Logger.info("Deleted #{del_bookmarks} orphaned bookmarks...")
     end
 
     if Keyword.get(options, :prune_orphaned_activities) do
-      prune_orphaned_activities()
+      del_activities = prune_orphaned_activities()
+      Logger.info("Deleted #{del_activities} orphaned activities...")
     end
 
+    {:ok, %{:num_rows => del_hashtags}} =
       """
       DELETE FROM hashtags AS ht
       WHERE NOT EXISTS (
@@ -315,9 +327,14 @@ def run(["prune_objects" | args]) do
       """
       |> Repo.query()
 
+    Logger.info("Deleted #{del_hashtags} no longer used hashtags...")
+
     if Keyword.get(options, :vacuum) do
+      Logger.info("Starting vacuum...")
       Maintenance.vacuum("full")
     end
+
+    Logger.info("All done!")
   end
 
   def run(["prune_task"]) do