feat(aiot): 截图持久化 — cos_key 存入 DB,proxyImage 支持 DB 兜底
- 新建 wvp_ai_camera_snapshot 表(camera_code → cos_key 映射) - 新建 AiCameraSnapshotMapper(getCosKey / upsert) - AiScreenshotServiceImpl: handleCallback 成功后将 cos_key 写入 DB - AiScreenshotServiceImpl: proxyScreenshotImage 增加 DB 兜底路径 Redis 缓存(5min) → DB(永久) → CosUtil 生成 presigned URL → 下载 - AiRoiController: Cache-Control 从 60s 增大到 300s Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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sql/wvp_ai_camera_snapshot.sql
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sql/wvp_ai_camera_snapshot.sql
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-- 截图持久化表:保存摄像头最新截图的 COS object key
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CREATE TABLE IF NOT EXISTS wvp_ai_camera_snapshot (
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camera_code VARCHAR(64) PRIMARY KEY COMMENT '摄像头编码',
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cos_key VARCHAR(512) NOT NULL COMMENT 'COS 对象键(永久有效)',
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updated_at DATETIME DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '最后更新时间'
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) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='AI摄像头截图持久化';
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