Deduplicate XML documentation using inheritdoc cref

[Copilot]

Replaces repeated identical <summary> blocks across overload families with <inheritdoc cref="..."/>, keeping one canonical doc per group.

Duplicate groups deduplicated

File	Method family	Canonical overload	Dupes
Writing/OptionalExtensions.cs	WriteNumberValue	WriteNumberValue(Utf8JsonWriter, byte?)	10
Writing/OptionalExtensions.cs	WriteNumber	WriteNumber(Utf8JsonWriter, string, byte?)	10
Writing/OptionalExtensions.cs	WriteStringValue	WriteStringValue(Utf8JsonWriter, DateTime?)	2
Writing/OptionalExtensions.cs	WriteString	WriteString(Utf8JsonWriter, string, DateTime?)	2
Http/HttpExtensions.cs	GetJsonAsync	GetJsonAsync(HttpClient, Uri, CancellationToken)	1

cref format

Explicit cref is used throughout (not bare <inheritdoc/>) since these are sibling overloads, not base/interface members. The receiver type (Utf8JsonWriter, HttpClient) is included as the first cref parameter — required because C# 14 extension(T) block members lower with the receiver as the first parameter in XML doc member IDs:

/// <summary>
/// Writes <paramref name="value"/> as a JSON number, or a JSON null if <paramref name="value"/> is null.
/// </summary>
public void WriteNumberValue(byte? value) { ... }

/// <inheritdoc cref="WriteNumberValue(Utf8JsonWriter, byte?)"/>
public void WriteNumberValue(decimal? value) { ... }

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.62%. Comparing base (fdd2432) to head (c4af825).
⚠️ Report is 1 commits behind head on prime.

Additional details and impacted files

@@           Coverage Diff           @@
##            prime      #29   +/-   ##
=======================================
  Coverage   96.62%   96.62%           
=======================================
  Files           8        8           
  Lines         415      415           
  Branches       70       70           
=======================================
  Hits          401      401           
  Misses         10       10           
  Partials        4        4           

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[Copilot]

Pull request overview

This PR reduces repeated XML documentation across overload families by replacing duplicated <summary> blocks with <inheritdoc cref="..."/>, keeping one canonical doc comment per method group.

Changes:

• Replaced repeated <summary> blocks for WriteNumberValue, WriteNumber, WriteStringValue, and WriteString overloads with <inheritdoc cref="..."/> in OptionalExtensions.
• Replaced a duplicated <summary> on the GetJsonAsync(string, CancellationToken) overload with <inheritdoc cref="..."/> in HttpExtensions.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
JsonExtensions/Writing/OptionalExtensions.cs	Deduplicates XML docs across nullable writer overload families via <inheritdoc cref="..."/>.
JsonExtensions/Http/HttpExtensions.cs	Deduplicates the GetJsonAsync overload summary via <inheritdoc cref="..."/>.

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