fix(deps): update tokio-prost monorepo to 0.14 (#34)

* fix(deps): update tokio-prost monorepo to 0.14

* fix: upgrade tonic to 0.14 to match prost 0.14

The Renovate bot updated prost to 0.14, but tonic 0.12 only supports
prost 0.13, causing version conflicts. This commit:

- Upgrades tonic from 0.12 to 0.14
- Replaces tonic-build with tonic-prost-build (new in 0.14)
- Adds tonic-prost as a runtime dependency
- Updates build.rs to use tonic_prost_build::configure()

The tonic 0.14 release split protobuf compilation into separate crates:
- tonic-prost-build for build-time code generation
- tonic-prost for runtime support

* chore: trigger CI to test prost 0.14 upgrade

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Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Pedro Piñera <pedro@pepicrft.me>

Author: renovate[bot]