Add worker for ingesting SBoM reports

What does this MR do and why?

Describe in detail what your merge request does and why.

• Epic: &8024 (closed)
• Issue: #365661 (closed)

Add the initial background processing to support the ingestion of CycloneDX Software Bill of Materials (SBoM) reports. Create a worker which runs after the completion of each EE CI pipeline and checks if it has SBoM artifacts. If it does, pass those artifacts to the IngestReportsService for processing.

IngestReportsService will be implemented later via #364709 (closed). A feature flag is used to allow for iterative development.

This MR is dependent on !91510 (merged).

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