**What**
Move the preliminary indexing action at boot time to a separate subscriber in order to defer the work load in the background and therefore to avoid increasing the load time when the number of products increase with time.
**Tests**
Add 10k products (since it is our limit, tried with 50k before getting the error limit) using
```sal
do $$
declare
counter integer := 0;
begin
while counter < 10000 loop
INSERT INTO product (id, title, description, handle, profile_id)
(SELECT * FROM ((SELECT random(), random(), random(), random(), 'sp_01FNB9K7FXB0SZMKXD013RJYSP')) as T);
counter := counter + 1;
end loop;
end$$;
```
then start the server and while the server is starting, hit the search end point repeatedly
FIXES CORE-258
Co-authored-by: Oliver Windall Juhl <59018053+olivermrbl@users.noreply.github.com>
b8ddb31f6f