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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
A little library will make it really easy - like https://github.com/spatie/ssl-certificate to return various data, & being able to run some tests (like is this cert till going to be valid in 7 days). You can get the raw fields too, which would have what you need.
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