Use Chinese short names in IPO reports

Request:
Prefer stock-app-style Chinese display names in IPO report tables, for example 圣邦股份 instead of the full legal issuer name.

Changes:
- Update the hk-ipo-analyst report naming rule to prefer sourced stock short names in 中文名 columns.
- Export stock_short_name into the analysis model dataset.
- Make generated single-ticker reports use the short Chinese name as the title/display label while retaining legal names for disambiguation.
- Refresh the latest dated report and reports README to use Chinese short names consistently.

Verification:
- git diff --check
- .venv/bin/python -m py_compile scripts/build_analysis_dataset.py scripts/generate_ipo_report.py
- CSV validation for stock_short_name on 03661, 01688, and 01191
- Confirmed latest report and README contain no matched full legal issuer names for the refreshed shortlist

scripts/build_analysis_dataset.py

@@ -378,6 +378,7 @@ def fetch_rows(conn: sqlite3.Connection) -> list[sqlite3.Row]:
           m.ticker,
           m.company_name_en,
           m.company_name_zh,
+          m.stock_short_name,
           m.board,
           m.status,
           m.listing_date,
@@ -466,6 +467,7 @@ def build_records(rows: list[sqlite3.Row], as_of: str) -> list[dict[str, Any]]:
             "ticker": row["ticker"],
             "company_name_en": row["company_name_en"],
             "company_name_zh": row["company_name_zh"],
+            "stock_short_name": row["stock_short_name"],
             "board": row["board"],
             "status": row["status"],
             "listing_date": row["listing_date"],
@@ -590,6 +592,7 @@ def write_dataset(records: list[dict[str, Any]], output_path: Path) -> None:
         "ticker",
         "company_name_en",
         "company_name_zh",
+        "stock_short_name",
         "board",
         "status",
         "listing_date",