* chore: update dependencies

Updated redis to 1.0.2 with API compatibility fixes and clippy lint fixes.

* fix: allow unused_assignments in derive tests

Clippy 1.92 now detects struct field assignments in derive macro
tests as unused. This is expected behavior since fields marked with
#[source], #[backtrace], #[provide] are consumed by the derive macro.

Following thiserror's approach of using allow attributes for
macro-generated code patterns in tests.

* ci: read MSRV from Cargo.toml (single source of truth)

Instead of hardcoding Rust version in CI, now MSRV is extracted
from Cargo.toml rust-version field. This ensures consistency
between local development and CI.

Changes:
- Added msrv job to extract version from Cargo.toml
- check job now depends on msrv and uses its output
- Updated cache key to use resolved toolchain version

* ci: fix Windows compatibility with shell: bash

* Update FUNDING.yml with custom funding links (#346)

Added custom funding links for cryptocurrency donations.