Verification of complete document collection

Versions (relevant - OpenSearch/Dashboard/Server OS/Browser):
OpenSearch 2.6.0

Describe the issue:

Hello! I have 3 indexes where the logs come in, I can’t change them. Using a Python script, I combine the documents from the 3 indexes by their operation_id into one and send it to the new index.
I would like to check if my document was created correctly in the new index. That is, there is a start and end time for each process.

Let’s just say the assembler runs every two minutes.
When checking for a full build, there will be a moment in time that the builder is in progress, and checking will mark it as broken.

The problem is that I don’t want to check my documents twice, as there will be a lot of them and I’m worried about the overload

Can you please advise me what can be used for this?

Thank you!

Relevant Logs or Screenshots:

Here is the structure of the fully collected document: