fix(analytics/Pipelines): drop the derived outputs from the variables section

[dearsimanovich-epam]

Description:

The enrichment pipeline's variables section presented the pipeline's derived outputs — where the evaluator's answer lands — as disabled rows of the same list, on the reasoning that one list should state everything passing between a pipeline and its evaluator. On screen that reads as something the operator chose and may change; greying a row out says "not now", not "not yours". The outputs are never a member of the request: the service derives them from the evaluator's outputs matched to the target's columns. They also did not fit the shape — an output carries a target column and sometimes a transform, two facts against the one value cell a variable has, so the list either hid the transform or grew a cell that stood empty on nearly every row.

This change drops them from the form entirely. They remain readable in the JSON editor, which already presents the pipeline whole, including every member the service assigns or resolves.

Key Changes:

• apps/ai-dial-admin/src/components/Analytics/Pipelines/Enrich/VariablesEditor.tsx — drops the outputs prop, the disabled output rows and the derived-outputs note; the grid comment now states why the shared grid exists on its own terms
• apps/ai-dial-admin/src/components/Analytics/Pipelines/Enrich/EnrichSection.tsx — stops passing form.outputs
• apps/ai-dial-admin/src/components/Analytics/Pipelines/Common/use-pipeline-form.ts — stops exposing outputs from the stored pipeline
• apps/ai-dial-admin/src/components/Analytics/Pipelines/Enrich/tests/VariablesEditor.spec.tsx — removes the two specs asserting the old disabled-rows behaviour
• apps/ai-dial-admin/src/constants/i18n.ts, apps/ai-dial-admin/src/locales/en.ts — removes the now-unused OutputsDerivedNote key and copy
• openspec/specs/analytics/pipelines/spec.md — the requirement and its scenario now state that the derived outputs are not presented in the form at all
• openspec/changes/archive/2026-09-15-drop-derived-outputs-from-pipeline-variables/ — archived change carrying the rationale

Checklist:

• the pull request name complies with Conventional Commits
• the pull request name ends with (Issue #<ticket>) (comma-separated list of issues)

🤖 Generated with Claude Code