feat(repair): regenerator + supplement 防御修复 + 迁移脚本

- 新增 app/tree/repair/regenerator.py（VLM 重生成 + 级联修复）
- supplement.py: deduplicate_field str() 防御 + inject_value strip
- patch.py: ruff format 格式化
- repair_trees.sh: conda source 激活修复
- 新增 migrate_from_trm4.sh 迁移工具
- enhance/__init__.py → repair/__init__.py 重命名

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

scripts/repair_trees.sh

@@ -17,6 +17,8 @@ set -euo pipefail
 
 CONCURRENCY="${CONCURRENCY:-16}"
 
+# shellcheck source=/dev/null
+source "$(conda info --base)/etc/profile.d/conda.sh"
 conda activate Video-Tree-TRM
 
 python tools/repair_trees.py \