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memfault-firmware-sdk
Memfault Firmware SDK for embedded systems. More information at https://docs.memfault.com.
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wolfBoot
wolfBoot is a portable, OS-agnostic, secure bootloader for microcontrollers, supporting firmware authentication and firmware update mechanisms.
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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.
I think MemFault has a product like this. They are active in the embedded community and also have great blogs about concepts you are looking for. I haven't used the product but blogs are usually really high quality.
There is wolfboot, an open source bootloader that is ready to go(min config required). It gives option to upload via SPI/UART/BLE/Ethernet.