Refactor Redis storage abstraction to fit the latest Rust updates without warnings

[geekbrother]

The latest Rust updates throw a warning on the Redis storage abstraction on rust-lang/rust#123748:

warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #123748 <https://github.com/rust-lang/rust/issues/123748>
    = help: specify the types explicitly
note: in edition 2024, the requirement `!: deadpool_redis::redis::FromRedisValue` will fail
   --> src/storage/redis/mod.rs:107:18

This part needs to be refactored to fit the clippy without #[allow(dependency_on_unit_never_type_fallback)].

[linear]

CR-525 Refactor Redis storage abstraction to fit the latest Rust updates without warnings