add UUID as new entry value in the add_entries processor

[Zhangxunmt]

Description

Added a new entry in the add_entries processor that generates a unique ID for each record. This is needed for cases where the original source data does not contain a unique identifier. The unique ID is essential for running asynchronous batch inference jobs, as it is used to match and merge the inference results back with the source data.

UUID.randomUUID() (UUID v4) uses Java's SecureRandom, and collision probability is so low it has never been observed in practice in any production system, which is what all major distributed systems use for this exact problem.

Usage

  processor:
    - add_entries:
        entries:
          - key: recordId
            generate_uuid: true

Issues Resolved

Resolves #[Issue number to be closed when this PR is merged]

Check List

• New functionality includes testing.
• New functionality has a documentation issue. Please link to it in this PR.
  • New functionality has javadoc added
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