[feat] Interview results dashboard

[erikbayerlein]

Epic: #71 (Arguição e Entrevista)
Use Case: #66

Fase 2 — Implementação posterior à fase de inscrição.

Description

Dashboard showing aggregated interview results for all candidates.

Acceptance Criteria

• Table showing all candidates with per-aspect averages, overall average, and final concept.
• Filter by theme, level, professor.
• Detailed view showing individual evaluations per candidate.
• Export functionality (CSV/PDF) for committee records.