fix(jstzd): use protocol version from proto params

[huancheng-trili]

Context

If baker path is not provided in user config, jstzd should fall back to the default baker path according to the target protocol version. If protocol version is specified in user config, that protocol version should be referenced by the baker config builder. The bug is that it still defaults to alpha when protocol version is provided in user config.

Description

Fixes the bug by checking the protocol version provided during baker config population.

Manually testing the PR

• Unit test: updated one test case
• Manual test: launched the sandbox locally and confirmed that this was fixed

[codecov]

Codecov Report

Attention: Patch coverage is 97.77778% with 1 line in your changes missing coverage. Please review.

Project coverage is 48.30%. Comparing base (8330a51) to head (8b70f68).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/jstzd/src/config.rs	97.77%	0 Missing and 1 partial ⚠️

Files with missing lines	Coverage Δ
crates/jstzd/src/config.rs	96.93% <97.77%> (+0.41%)	⬆️

... and 1 file with indirect coverage changes

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[ryutamago]

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