very fast at protocol indexer with flexible filtering, xrpc queries, cursor-backed event stream, and more, built on fjall
rust fjall at-protocol atproto indexer

[backfill] lock sparse existing-head snapshot master

persist_sparse_backfill computed its existing-head diff before any lock, so a live write or operator redaction could invalidate unchanged decisions before the root commit landed. permanent mode now holds the repo write lock from before the snapshot through commit; ephemeral mode has no heads and nothing to lock. issue: hydrant-uee


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