[dotnet] Annotate nullability on Log protocol

[RenderMichael]

User description

Thanks for contributing to Selenium!
A PR well described will help maintainers to quickly review and merge it

Before submitting your PR, please check our contributing guidelines.
Avoid large PRs, help reviewers by making them as simple and short as possible.

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.

---

PR Type

Enhancement

---

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.

---

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

---

Need help?

Type /help how to ... in the comments thread for any questions about Qodo Merge usage.

Check out the documentation for more information.

[qodo-merge-pro]

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-merge-pro]

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