refactor(export): switch render output to fixed 7-column schema (Scénario, Test, ...)
All three renderers (MD, CSV, PDF) now emit a uniform 7-column table with
French headers matching the RT↔SOC handoff contract locked in SPEC.md fdab324.
Helpers added:
- _format_execution(sim): canonical 3-part concat (executed_at / commands / execution_result)
- _MD_HEADERS / _HTML_HEADERS / _CSV_HEADERS unified to the same 7 FR strings
Helpers removed (no longer called):
- _tactic_names() — MITRE tactics dropped from export
- _enrich_sim_techniques() — MITRE techniques dropped from export
Fields dropped from export: status, techniques, tactic_ids, prerequisites, id,
created_at, updated_at (intentional — focused RT↔SOC handoff, see SPEC §Export).
_csv_safe() still applied to all 7 user-controlled cells including Exécution concat.
Tests updated: 255 passed, ruff clean, mypy clean.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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