chore(deps): bump redb to 4#73
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Move redb from 2 to 4 in the workspace table (local-store backend, engine only). One source change: redb 3 relocated begin_read onto a new ReadableDatabase trait, so local_store_redb.rs imports it. Every other call site (Database::create, TableDefinition, open_table, insert, remove, commit, get/value, range) is unchanged across the two majors, and the StorageError source variants are all still present. On-disk format note: redb 4 cannot open a database written by redb 2. This is a pre-release codebase with no persistent-data guarantees, so operators wipe the local-store directory on upgrade; no in-code migration path is added.
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Fifth in the staged dependency-modernisation series (after #68, #69, #70, #71, #72).
What
Bumps
redbfrom2to4(two majors) in[workspace.dependencies]. redb backs the per-module local-store; only the engine uses it.One source change
redb 3 introduced a
ReadableDatabasetrait and relocatedbegin_readonto it, solocal_store_redb.rsadds the import:Everything else is unchanged across 2 -> 4:
Database::create,TableDefinition,open_table,insert,remove,commit,get/value,range, and all fiveStorageErrorsource variants.begin_writestayed inherent.On-disk format
redb 4 cannot open a database file written by redb 2. This is a pre-release codebase with no persistent-data guarantees, so the accepted upgrade path is to wipe the local-store directory; no in-code migration is added. Flagging for the changelog.
Testing
Verified under nix:
cargo build -p nexum-engine --all-targets,clippy --all-targets -- -D warnings,cargo test -p nexum-engine(105 passed - all local-store CRUD, list_keys, namespace-isolation, persistence, and concurrent-stress tests). CI runs the full matrix.AI Assistance
Claude Code (Opus 4.8) used for the redb 2->4 API-migration analysis and verification.