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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.
This is not an exact solution you are looking for, but magit-todos displays todos in magit-status buffers. If your repository is huge, this can slow down magit, so I don't know if you would use it.
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