phase 7-8 完成 + warmup 修复 + 产物结构化重组

主要内容：
- Phase 8 PROMOTE: finalist #1 (trial #324) registry 条目，自动生成
- Optuna objective warmup bug 修复 (shared/optimizer/objective.py)
- studies/ 目录按用途重组为 optuna/ + finalists/ + features/ 三层
- reports/ 加入 Optuna 中文 dashboard (5 主图 + 18 slice + 15 contour)
- 新增 PROJECT_GUIDE.md 项目说明文档
- 新增 build_registry_entry.py / build_optuna_dashboard.py / build_feature_datasets.py
- .gitignore: 允许提交 studies/*.db (Optuna DB) 和 reports/*.html (MT5 + dashboard)

scripts/inspect_report.py

@@ -0,0 +1,37 @@
+"""Inspect the HTML structure to find test period / sections."""
+from pathlib import Path
+from lxml import html
+
+for label, fn in [("IS", "IS-ReportTester-52845377.html"), ("OOS", "OOS-ReportTester-52845377.html")]:
+    p = Path("reports") / fn
+    raw = p.read_bytes()
+    text = raw.decode("utf-16") if raw[:2] in (b"\xff\xfe", b"\xfe\xff") else raw.decode("utf-8", errors="replace")
+    tree = html.fromstring(text)
+
+    print(f"=== {label} ({fn}) ===")
+
+    # Find the test period row
+    for row in tree.iter("tr"):
+        cells = row.findall("td") or row.findall("th")
+        if len(cells) < 2:
+            continue
+        label_t = cells[0].text_content().strip()
+        if any(k in label_t for k in ["期间", "Period", "建模", "Model",
+                                       "前向", "Forward", "起止", "Date"]):
+            value = cells[1].text_content().strip()
+            print(f"  {label_t}: {value}")
+
+    # Look for big section headers
+    print(f"  -- h1/h2/h3 headers --")
+    for tag in ("h1", "h2", "h3", "h4"):
+        for el in tree.iter(tag):
+            t = (el.text_content() or "").strip()
+            if t:
+                print(f"  <{tag}>: {t}")
+
+    # Count tables and tr
+    tables = tree.findall(".//table")
+    print(f"  tables: {len(tables)}")
+    total_tr = sum(len(t.findall(".//tr")) for t in tables)
+    print(f"  total <tr>: {total_tr}")
+    print()