feat(flowmeter): 新增标况累计流量字段，流量重命名为标况瞬时流量 close pw-4028 PW-4251 (!40) · Merge requests · frontend / zj-gasalert-fe · GitLab

dongjw requested to merge feature/20260521-pw-4028-flowmeter-standard-traffic into develop May 21, 2026

FLOWMETER_DATA_TYPES 新增 total_traffic 数据类型，traffic 显示名改为"标况瞬时流量"
采集数据列表页（/data-collection/flow-meter）：列名"流量"改为"标况瞬时流量"，新增"标况累计流量"列
数据一览表（/data-glance）流量计区块：列名"流量"改为"标况瞬时流量（Nm³/h）"，新增"标况累计流量（Nm³）"列

Ref: PW-4028 Amp-Thread-ID: https://ampcode.com/threads/T-019e4905-af83-7319-bdb2-09b25504717b Co-authored-by: Amp amp@ampcode.com