Document network access limitations preventing integration tests#6

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Copilot wants to merge 8 commits intomasterfrom

copilot/improve-test-coverage

Commits on Feb 27, 2026

Initial plan
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Add comprehensive unit tests - achieve 70% coverage

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gsmachado
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Add additional tests for RIR parsing, local addresses, and edge cases

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gsmachado
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Add coverage verification rules and test coverage documentation

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gsmachado
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Address code review feedback - add edge case tests and clarifying comments

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gsmachado
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Final code review improvements - clarify test expectations and fix documentation

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gsmachado
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Fix compilation error in IPv4SubnetTest

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gsmachado
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Document network access limitations and DNS resolution blocking

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gsmachado
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