Add unit tests for pkg/internal/utils package

[Copilot]

The pkg/internal/utils package had no test coverage. Added comprehensive tests for authentication, network error handling, and identity generation utilities.

Changes

• basic_test.go: Tests for HTTP Basic Auth parsing/formatting

  • Edge cases: invalid base64, missing prefix, case-insensitive handling
  • Round-trip validation for encoding/decoding consistency

• network_test.go: Tests for network error detection and HTTP response validation

  • Error classification: EOF, network timeouts, generic errors
  • HTTP status code handling: 5xx, 429, 4xx with mock and real network scenarios

• identity_test.go: Tests for identity generation

  • Format validation (16-char hex + unix timestamp)
  • Consistency checks across invocations

Coverage

Achieves 62.3% coverage of previously untested package containing core utilities used across controller, runner, and API server components.

Original prompt

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This section details on the original issue you should resolve

<issue_title>Add test</issue_title>
<issue_description></issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Add test #9

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