feat: add serde derives for CacheDB
under "serde" flag
#911
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Idea
In order to be able to take a snapshot of a
CacheDB
that can then be shared in many ways, having theSerialize + Deserialize
added is helpful.Feedback
Change is minimal and is not set as default. Wrote simple unit test to check that this works. If this change is not wanted upstream, that is okay. Perhaps it can be under its own separate flag then, if need be. Please let me know!