Return actual build id when requesting build on another node

[tiainen]

Description

Fixes #1313

This PR returns the actual build ID to the Pyrsia CLI when the build command was used and the actual build was triggered on a different Pyrsia node instead of the local Pyrsia node.

Steps to test

Follow the procedure described in Pyrsia demo: build Docker images from source. When triggering a build from source from node B (aka the node that was not authorized) using the pyrsia CLI, it should print a UUID instead of a regular number:

Build request successfully handled. Build with ID 4cffa388-52b1-4f5c-9516-bbdbcfbf49ca has been started.

PR Checklist

• I've read the contributing guidelines.
• I've read "What is a Good PR?"
• I've included a good title and brief description along with how to review them.
• I've linked any associated an issue.

Code Contributions

• I've built the code cargo build --all-targets successfully.
• I've run the unit tests cargo test --workspace and everything passes.

[codecov]

Codecov Report

Merging #1321 (6eae790) into main (63d098b) will increase coverage by 0.92%.
The diff coverage is 80.76%.

@@            Coverage Diff             @@
##             main    #1321      +/-   ##
==========================================
+ Coverage   47.71%   48.64%   +0.92%     
==========================================
  Files          54       54              
  Lines        2821     2835      +14     
==========================================
+ Hits         1346     1379      +33     
+ Misses       1475     1456      -19     

Impacted Files	Coverage Δ
pyrsia_node/src/main.rs	0.00% <0.00%> (ø)
pyrsia_node/src/network/handlers.rs	0.00% <0.00%> (ø)
src/network/build_protocol.rs	84.37% <85.71%> (+38.22%)	⬆️
src/network/client.rs	76.59% <100.00%> (+2.68%)	⬆️
src/network/event_loop.rs	31.04% <100.00%> (+4.03%)	⬆️

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