Add candidate display aliases

[SoundBlaster]

Summary

• Add proposal 0212 and deterministic, presentation-only candidate display aliases.
• Link related task: Human-Friendly Candidate Aliases.

Motivation

• Long generated candidate ids and constraint labels are difficult to scan in product review surfaces.
• Consumers must not independently abbreviate canonical references.

Goals

• Publish public-safe aliases without changing ids, refs, materialized paths, or promotion inputs.
• Keep ontology aliases, routing aliases, gates, and Git authority out of scope.

Changes

• Derive and validate aliases in candidate graph generation; preserve them through rerun materialization.
• Expose alias index and topology endpoint aliases in Candidate Overview; use aliases in materialized review YAML.

Spec Evidence

Spec-ID: NO-SPEC-IMPACT
Proposal-ID: 0212
Spec-Impact: behavior
Spec-Rationale: This is a review-only producer and presentation contract over existing candidate graph identities; canonical spec ids and promotion semantics are unchanged.

Validation

• Tests added/updated for changed behavior
• Local checks passed

Commands run:

.venv/bin/python -m pytest tests/test_candidate_spec_graph.py tests/test_candidate_overview.py tests/test_candidate_spec_materialization.py tests/test_idea_to_spec_rerun_materialization.py -q
make test
make publish-bundle
make proposal-tracking-gate
make docc-sync

Results:

• Focused tests: 52 passed.
• Full suite: 1844 passed.
• Public bundle safety gate: passed.

Risks / Notes

• Backward compatibility impact: additive optional fields; older consumers continue to use title/id.
• Migration/config changes required: none.
• Known limitations: aliases are producer-derived and not operator-editable.

Checklist

• PR title clearly describes the change
• Scope is focused and minimal
• Documentation updated (or N/A)
• Workflow/artifact changes distinguish presence from readiness/status
• Consumers prefer authoritative repaired/promoted/latest artifacts where relevant
• Temporary or intermediate paths are scoped to the current run/task where relevant
• No secrets or sensitive data added

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