[FEAT] Embed subscribed applications in topology canvas data

[fmenesesg]

Problem / need

The topology canvas supports toggling subscribed applications in the product relationship graph, but the canvas data generator only emitted product→backend edges. Regenerated canvas DATA lacked the p field (applications per product).

Proposed solution

Extend the canvas data builder to include sorted application entries [name, plan, state] per product under key p, keyed by product system name.

Suggested milestone

Backlog

Impacted repos

• 3scaleextract

[fmenesesg]

Superseded by PR #45 (generic topology canvas). Closing and sanitizing issue text.