feat: 核心数据模型(Site/Visitor/VisitSession/Event/DailyStat)

VisitSession.started_at/ended_at 在计划模型基础上加 null=True(计划测试
未传这两字段,原 NOT NULL 会导致测试失败;ended_at 为空也表示会话进行中)。

Co-Authored-By: Claude Code <noreply@anthropic.com>
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浅念
2026-09-15 11:45:03 +08:00
parent cda80b1605
commit d1472c1845
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