Implement WeChat Pay V3 subscription billing functionality (预约扣费功能/连续包月功能)#3688

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copilot/fix-3593

Commits on Aug 31, 2025

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Copilot
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Implement WeChat Pay V3 subscription billing functionality (预约扣费功能)

Copilot
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binarywang
committed
Add comprehensive usage documentation for subscription billing functionality

Copilot
and
binarywang
committed