Stock Sync Code Update

First TODO in the previous TODO list was:
Very heavy server load on product stock sync.
Solution:

• Use the CA “lastmodified” timestamp value “stock” table ALTER introduced in previous post “Starting Over” to compare the changes done since last sync time.
• Create an API that handles the stock update in case stock quantities changes have been detected.

Starting work on this issue, but according to the previous “Fetch Or Push” post, I should make the interface to be on CA’s server side.
Since moving the interface to be on CA’s side will require more work, so I will implement it first normally on Magento’s Online Store side but make it compatible with future interface change.

1- Add “insert“ and “get“ last stock update sync timestamp in preference table (done)
2- Edit current stock query to compare with last stock sync time (done)
3- Add Api Configuration to admin (done)
4- Add Api function that will handle the request, make the query and return result (done)
5- Edit, Add stock sync function to use the Api connection (done)
6- Add cron job to handle auto stock sync using new concept (done)
7- Disable old stock sync concept cron job (done)