[codex] Remove generated voice report payloads

[mvyleteljr]

Summary

• remove generated voice report payloads that were accidentally included in the Xenon package surface
• remove report globs from papers.voice package data
• add an ignore guard for papers/voice/**/reports/ so generated reports do not come back

Why

Persona Audit only needs the curated voice assets and helper APIs from Xenon. Report results should live in Neon or artifact storage, not in the GitHub package history.

Validation

• uv run python -c "from papers.voice.assistant_axis.assets import load_asset_manifest; from papers.voice.emotions.assets import emotion_concepts; from papers.voice.emotions.replication.validation import _PAPER_EMOTION_CLUSTERS; print(load_asset_manifest()['asset']['id']); print(len(emotion_concepts(mode='full'))); print(len(_PAPER_EMOTION_CLUSTERS))"
• uv run pytest tests/pipelines_v2/engine/test_vllm_capture_helpers.py
• uv run python -m py_compile papers/voice/assistant_axis/assets.py papers/voice/emotions/assets.py papers/voice/emotions/replication/validation.py pipelines_v2/engine/vllm/capture.py pipelines_v2/engine/vllm/engine.py