feat: Add OneChart score reconstruction research files and validation results

- Introduced new JSON files for normalized and raw inputs, source metadata, and public inputs.
- Added findings document detailing the methodology and results of the score reconstruction.
- Included member differences and worked examples for clarity on data discrepancies.
- Implemented a Python script for reproducing scores based on public inputs.
- Created SQL for raw reaggregation of data.
- Added task metadata for tracking the research completion and validation metrics.

.trellis/tasks/archive/2026-09/09-21-onechart-score-reconstruction/task.json

@@ -0,0 +1,33 @@
+{
+  "id": "onechart-score-reconstruction",
+  "name": "onechart-score-reconstruction",
+  "title": "还原 OneChart 波段与单日资金流评分",
+  "description": "只读数值还原 OneChart 单日与波段资金评分；12 日 9492 条公开样本精确重现，并完成 PostgreSQL 原始快照对照。",
+  "status": "completed",
+  "dev_type": null,
+  "scope": null,
+  "package": null,
+  "priority": "P2",
+  "creator": "yuxuanhui",
+  "assignee": "yuxuanhui",
+  "createdAt": "2026-09-21",
+  "completedAt": "2026-09-21",
+  "branch": null,
+  "base_branch": "main",
+  "worktree_path": null,
+  "commit": null,
+  "pr_url": null,
+  "subtasks": [],
+  "children": [],
+  "parent": null,
+  "relatedFiles": [],
+  "notes": "研究完成。没有实施产品修改、修改数据库、共享规格推广或提交。输入版本与成员口径差异详见 research/database-validation.md。",
+  "meta": {
+    "work_kind": "read_only_research",
+    "public_validation_rows": 9492,
+    "public_score_max_abs_error": 3.410605131648481e-13,
+    "database_latest_rows": 791,
+    "database_ratio_mae": 0.9783318452555938,
+    "database_swing_mae": 1.9075528008117222
+  }
+}