chore(deps): update redb requirement from 2 to 3

[dependabot]

Updates the requirements on redb to permit the latest version.

Release notes

Sourced from redb's releases.

3.1.0

• Implement std::error::Error for SetDurabilityError
• Fix compilation error on various non-tier-1 platforms, such as wasm32-unknown

Changelog

Sourced from redb's changelog.

3.1.0 - 2025-09-25

• Implement std::error::Error for SetDurabilityError
• Fix compilation error on various non-tier-1 platforms, such as wasm32-unknown

3.0.2 - 2025-09-16

• Fix performance issue where a transaction with a large number of writes would cause WriteTransaction::abort() and committing non-durable transactions to become slow.

3.0.1 - 2025-08-23

• Fix correctness issue with range(), extract_from_if(), and retain_in(). If a RangeBounds with start > end was passed as an argument and start and end keys were stored in different internal pages in the database (i.e. a sufficient condition is that more than 4KiB of key-value pairs were between the two keys) then these methods would perform as if the argument had been start..
• Fix performance regression, from redb 2.x, where Durability::None commits could become linearly slower during a series of transactions.

2.6.3 - 2025-08-23

• Fix correctness issue with range(), extract_from_if(), and retain_in(). If a RangeBounds with start > end was passed as an argument and start and end keys were stored in different internal pages in the database (i.e. a sufficient condition is that more than 4KiB of key-value pairs were between the two keys) then these methods would perform as if the argument had been start..

1.5.2 - 2025-08-23

• Fix correctness issue with range(), drain(), and drain_filter(). If a RangeBounds with start > end was passed as an argument and start and end keys were stored in different internal pages in the database (i.e. a sufficient condition is that more than 4KiB of key-value pairs were between the two keys) then these methods would perform as if the argument had been start..

3.0.0 - 2025-08-09

Removes support for file format v2.

Use Database::upgrade(), in redb 2.6, to migrate to the v3 file format.

General storage optimizations

The v3 file format has been further optimized to reduce the size of the database. Databases with only a few small keys will see the largest benefit, and the minimum size of a database file has decreased from ~2.5MiB to ~50KiB. To achieve the smallest file size call Database::compact() before dropping the Database.

Additionally, performance is ~15% better in bulk load benchmarks. This was achieved by implementing a custom hash function for various in-memory HashSets and HashMaps, and by optimizing the usage of buffers held in Arcs to reduce the number of atomic instructions executed.

Optimize storage of tuple types

Storage of variable width tuple types with arity greater than 1 is more efficient. The new format elides the length of any fixed width fields and uses varint encoding for the lengths of all variable width fields.

... (truncated)

Commits

• 574f1cf Bump version to 3.1.0
• 496c4e8 Update changelog
• 157ab62 Implement std::Error for SetDurabilityError
• 0a1b7d9 Move Format and Clippy before any tests
• 3ee20ac Replace grep check with equivalent Clippy lints
• dc247cb Run cargo check on wasm32-unknown-unknown
• 6c76145 Implement missing method FileBackend::new_internal
• be5f8fe Bump version to 3.0.2
• 9cc578f Update changelog
• 3674fc7 Improve cache flush performance
• Additional commits viewable in compare view

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