[dotnet] Annotate nullability on Log protocol

[RenderMichael]

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Annotate nullability on Log protocol

Motivation and Context

Contributes to #14640

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• I have read the contributing document.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

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PR Type

Enhancement

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Description

• Enabled nullable reference types in multiple Log protocol classes.

• Added nullability annotations to event handlers and parameters.

• Introduced ArgumentNullException for constructor parameter validation.

• Improved code clarity and safety across Log protocol implementations.

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Changes walkthrough 📝

Relevant files

Enhancement

Log.cs Enable nullable reference types in `Log` base class            dotnet/src/webdriver/DevTools/Log.cs Enabled nullable reference types. Annotated EntryAdded event with nullable type. +3/-1      V130Log.cs Add nullability and validation in `V130Log`                            dotnet/src/webdriver/DevTools/v130/V130Log.cs Enabled nullable reference types. Added ArgumentNullException for constructor parameter validation. Updated event handler to accept nullable sender. Simplified event propagation logic. +9/-5      V131Log.cs Add nullability and validation in `V131Log`                            dotnet/src/webdriver/DevTools/v131/V131Log.cs Enabled nullable reference types. Added ArgumentNullException for constructor parameter validation. Updated event handler to accept nullable sender. Simplified event propagation logic. +9/-5      V132Log.cs Add nullability and validation in `V132Log`                            dotnet/src/webdriver/DevTools/v132/V132Log.cs Enabled nullable reference types. Added ArgumentNullException for constructor parameter validation. Updated event handler to accept nullable sender. Simplified event propagation logic. +8/-4      V85Log.cs Add nullability and validation in `V85Log`                              dotnet/src/webdriver/DevTools/v85/V85Log.cs Enabled nullable reference types. Added ArgumentNullException for constructor parameter validation. Updated event handler to accept nullable sender. Simplified event propagation logic. +8/-4

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[qodo-code-review]

PR Reviewer Guide 🔍

Here are some key observations to aid the review process:

⏱️ Estimated effort to review: 2 🔵🔵⚪⚪⚪

🧪 No relevant tests

🔒 No security concerns identified

⚡ Recommended focus areas for review Missing Null Check The constructor does not validate the adapter parameter for null, unlike the other version classes that throw ArgumentNullException this.adapter = adapter; this.adapter.EntryAdded += OnAdapterEntryAdded;

[qodo-code-review]

PR Code Suggestions ✨

Explore these optional code suggestions:

Category	Suggestion	Impact
Possible issue	Add missing null check Add null check for adapter parameter in constructor using throw pattern to match other version implementations dotnet/src/webdriver/DevTools/v85/V85Log.cs [40-43] public V85Log(LogAdapter adapter) { - this.adapter = adapter; + this.adapter = adapter ?? throw new ArgumentNullException(nameof(adapter)); this.adapter.EntryAdded += OnAdapterEntryAdded; Apply this suggestion Suggestion importance[1-10]: 8 __ Why: Adding null check for constructor parameter is crucial for preventing NullReferenceException and maintaining consistency with other version implementations. This is a significant defensive programming practice.	Medium
General	Make field immutable Mark the adapter field as readonly since it's only set in the constructor and never modified dotnet/src/webdriver/DevTools/v132/V132Log.cs [33] -private LogAdapter adapter; +private readonly LogAdapter adapter; Apply this suggestion Suggestion importance[1-10]: 5 __ Why: Making the field readonly improves code safety by preventing accidental modifications after initialization, though the impact is moderate since the field is already private and only set in constructor.	Low

[RenderMichael]

Failures are unrelated to this PR

//java/test/org/openqa/selenium/mobile:NetworkConnectionTest
//java/test/org/openqa/selenium/remote:RemoteWebDriverScreenshotTest
//java/test/org/openqa/selenium/remote:RemoteWebDriverScreenshotTest-firefox-beta
//rb/spec/integration/selenium/webdriver:network-firefox-beta-bidi
//rb/spec/integration/selenium/webdriver:network-firefox-bidi