Description

The current handling of stream ingestion in syncManager can lead to a memory leak when trying to ingest a stream with a lot of data.
The problem is identified: the manageBackPressure method in syncManager doesn't work properly, leading to the eventsQueue length increasing without any limit

Environment

1. OS (where OpenCTI server runs): { e.g. Mac OS 10, Windows 10, Ubuntu 16.4, etc. }
2. OpenCTI version: { e.g. OpenCTI 1.0.2 }
3. OpenCTI client: { e.g. frontend or python }
4. Other environment details:

Reproducible Steps

Steps to create the smallest reproducible scenario:

1. Add an opencti stream ingestion on a platform with a large amount of data

Expected Output

The data is ingested at a steady pace with a steady memory footprint

Actual Output

The memory used by openCTI increases without stopping

Additional information

Screenshots (optional)