修复 Tier1 在 Postgres 上 datetime 序列化崩溃#46
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_build_structure_prompt 对原始 DB 行 json.dumps 时,PG 返回的 datetime 对象(SQLite 为字符串)抛 TypeError,Tier1 发现整体失败。 加 default=str 保持双后端一致;附回归测试(datetime 行能进 prompt)。
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问题
生产(PG)跑圈定后的 Tier1 发现时,agents/paradigm_agent.py 的 _build_structure_prompt 对信号原始行 json.dumps 抛 'Object of type datetime is not JSON serializable',Tier1 全程失败(Tier2 不受影响)。SQLite 时间戳为字符串,测试未暴露。
修复
json.dumps(..., default=str);回归测试:含 datetime 的信号行能正常进 prompt(master 代码上红、本分支绿)。
验证
全套 pytest:15 failed / 506 passed,失败清单为既有 15 条。