feat(jstzd): Implement health check for OctezNode

[huancheng-trili]

Context

Part of JSTZ-116.

JSTZ-116

Description

Implement health check for OctezNode.

Manually testing the PR

• Integration test: ran the code in the file octez_node_test.rs and everything worked as expected.

[codecov]

Codecov Report

Attention: Patch coverage is 77.77778% with 4 lines in your changes missing coverage. Please review.

Project coverage is 37.29%. Comparing base (a737e1f) to head (c8b9df6).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/jstzd/src/task/octez_node.rs	77.77%	4 Missing ⚠️

Files with missing lines	Coverage Δ
crates/jstzd/src/task/octez_node.rs	88.27% <77.77%> (+1.25%)	⬆️

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