🧪 [testing improvement] Add unit tests for PortMapping::parse error handling and validation

[Cylae]

🎯 What

Addressed missing test coverage for PortMapping::parse in server_manager/src/services/mod.rs. Specifically covered edge cases and invalid input strings during port parsing.

📊 Coverage

The new test suite covers:

• Valid port formats (80, 8080:80/udp, 127.0.0.1:8080:80/tcp)
• Invalid port number format error handling (invalid, 8080:invalid, 127.0.0.1:invalid:80, 65536)
• Unsupported protocol error handling (80/sctp)
• Invalid part count / too many colons error handling (127.0.0.1:8080:80:90)

✨ Result

All 4 test functions (test_port_mapping_parse_valid, test_port_mapping_parse_invalid_port_format, test_port_mapping_parse_unsupported_protocol, test_port_mapping_parse_invalid_parts) run and pass cleanly, ensuring robust input parsing and error handling for service port configurations.

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PR created automatically by Jules for task 16855835431767212044 started by @Cylae

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