Track container image metadata in sqlite (tag, image hash, version of agent)

[nezhar]

Summary

Implement container image metadata tracking in the sqlite database. Metadata to include:

• Image tag
• Image hash
• Agent version

Motivation

Tracking these fields will improve traceability and auditing of deployed container images and agent versions, which is critical for debugging and reproducibility.

Acceptance Criteria

• Upon each relevant operation, persist image tag, image hash, and agent version into the sqlite DB
• Database schema is updated accordingly, and migrations provided
• Unit and integration tests cover the image metadata tracking logic
• Documentation is updated to explain the new tracked fields

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Label: enhancement