feat(xueqiu): add earnings-date command

[platoneko]

Summary

Add new YAML adapter xueqiu/earnings-date to fetch upcoming earnings report dates from xueqiu company events API (/v5/stock/screener/event/list.json).

Supports A-share (e.g. SH600519) and H-share (e.g. 00700) stocks.

Usage

# List all earnings dates (A-share)
opencli xueqiu earnings-date --symbol SH600519

# List all earnings dates (H-share)
opencli xueqiu earnings-date --symbol 00700

# Show only the next upcoming (unreleased) earnings date
opencli xueqiu earnings-date --symbol 01810 --next

# JSON output
opencli xueqiu earnings-date --symbol SH600519 -f json

# Limit results
opencli xueqiu earnings-date --symbol SZ000858 --limit 5

Example Output

┌────────────┬────────────────────┬───────────┐
│ Date       │ Report             │ Status    │
├────────────┼────────────────────┼───────────┤
│ 2026-03-23 │ 发布2025财年四季报 │ ⏳ 未发布 │
├────────────┼────────────────────┼───────────┤
│ 2025-11-17 │ 发布2025财年三季报 │ ✅ 已发布 │
└────────────┴────────────────────┴───────────┘

Arguments

Arg	Type	Default	Description
--symbol	str	(required)	Stock symbol (e.g. SH600519, SZ000858, 00700)
--next	bool	false	Only return the closest upcoming unreleased earni?s date
--limit	int	10	Max number of results

Implementation Details

• Queries xueqiu company events API and filters by subtype === 2 (scheduled earnings release)
• Displays ⏳/✅ status based on whether the report date is in the future or past
• --next flag sorts future events by date and returns only the nearest one