* Add DeadSlots column family
* Filter dead forks from get_slots_since
* Mark erroring slots as dead in replay stage, add test
* Mark dead forks in progress instead of removing them
* Fix logging process_entries failures in replay_stage
* Unignore test_fail_entry_verification_leader
* fix erasure, more tests for full blobs, more metrics
* Revert "Revert "Use Rust erasure library and turn on erasure (#3768)" (#3827)"
This reverts commit 4b8cb72977.
* split out erasure into new crate; add implementation using rust reed-solomon-library
* Track erasures with a &[bool] instead of indexes
* fix bug that reported the number of erasures incorrectly
* Introduce erasure `Session` for consistent config
* Increase test coverage; fix bugs
* Add ability to remove blobs from erasure meta tracking. test added
* Track deletion of coding blobs in blocktree via ErasureMeta. Added to
test
* Remove unused functions in blocktree
* add randomness to recovery thread to exercise recovery due to either new
data or coding blobs
* Add unit test for ErasureMeta index handling
* Re-enable test in broadcast stage
* Add contains_all_parents flag to SlotMeta to prep for tracking detached heads
* Add new DetachedHeads column family
* Remove has_complete_parents
* Fix test
* Mostly implement key-value store and add integration points
Essential key-value store functionality is implemented, needs more work to be integrated, tested, and activated.
Behind the `kvstore` feature.
