E1 (P0): Fix subjective metadata ownership and layer cycles

[agustif]

Parent: #206

Objective

Create a single canonical owner for subjective metadata and remove cross-layer cycles.

Success Criteria

• No duplicate display/weight/default maps.
• No scoring runtime cycle-break imports for metadata lookup.
• No upward imports from desloppify/base/ into engine, intelligence, languages, or app.

[agustif]

Implementation started in draft PR #226 (branch: feat/e1-metadata-ownership-cycles). This includes canonical metadata catalog, removal of scoring/metadata cycle-break imports, and base-layer import boundary cleanup for subjective metadata.

[agustif]

Hash refresh after history cleanup: E1 branch head is now e6e4469 (TASKS.md removed from commit history). Functional scope is unchanged from prior implementation update.

[agustif]

Completed via implementation PR(s) in this program. Closing as done.