Enhancing Relationship PP Filtering: Adding Second-Level Related Content Option

Parent Issue

#31036

Problem Statement

After this PR (#31036), the client is now reporting that they receive too many items when sending a Contentlet with a relationship using PP.

Steps to Reproduce

• Create a Content Type C with a single Text field called title.
• Create a Content Type B with:
  A Text field called title.
  A relationship field rel pointing to Content Type C.
• Create a Content Type A with:
  A Text field called title.
  A relationship field rel pointing to Content Type B.
• Create a Contentlet for C and name it c1.
• Create a Contentlet for B, name it b1, and relate it to c1.
• Create a Contentlet for A and name it a1.
• Create a bundle and add a1.
• Generate the bundle using the "Everything and Dependencies" filter (Really it is going to happen with any of the filter).
• Check the Manifest—you will see that c1 is included.

Acceptance Criteria

We want to add a new filter that includes second-level related content (such as c1 in the example). Meanwhile, the "Everything and Dependencies" filter should remain unchanged, excluding second-level related content as it did before.

dotCMS Version

latest in main

Proposed Objective

Core Features

Proposed Priority

Priority 2 - Important

External Links... Slack Conversations, Support Tickets, Figma Designs, etc.

https://dotcms.freshdesk.com/a/tickets/29642
https://helpdesk.dotcms.com/a/tickets/29668

Assumptions & Initiation Needs

No response

Quality Assurance Notes & Workarounds

No response

Sub-Tasks & Estimates

No response

Start by reviewing parent issue #31036 and the reproduction steps for the three-level related-content setup. The work is done when a new filter includes second-level related content such as c1, while the existing "Everything and Dependencies" filter continues to exclude it.