Expand tests for the LCP license HTTP client

[amirHdev]

Summary

Add more branch coverage around the LCP license HTTP client, especially the non-happy-path behavior for license fetch and revoke requests.

Why this matters

This package sits on an important integration seam, and better tests here would make refactors safer without requiring deep knowledge of the whole codebase.

Suggested files

• internal/lcp/license/license.go
• internal/lcp/license/license_client_test.go

Acceptance criteria

• Tests cover at least one failing GetLicense fallback path.
• Tests cover at least one RevokeLicense error path beyond the existing soft-404 case.
• Tests use httptest and do not depend on external services.
• go test ./... passes.

Nice to have

• Keep the test server setup easy to read for first-time contributors.