Formatting tweaks

[martincostello]

Apply some refactoring spotted while experimenting with C# 15:

• Add trailing commas.
• Use primary constructors.
• Use is instead of ==.
• Simplify some pattern matching.

[Copilot]

Pull request overview

Refactors a set of tests, docs snippets, benchmarks, and one core utility type to adopt newer C# syntax patterns (primary constructors, constant patterns via is, simplified property patterns) and apply consistent trailing-comma formatting.

Changes:

• Converted a few small helper/strategy classes to use primary constructors and inline field/property initialization.
• Added trailing commas in object/collection/switch-expression initializers for formatting consistency.
• Simplified select pattern-matching expressions (e.g., is constant patterns and property patterns).

Reviewed changes

Copilot reviewed 14 out of 14 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
test/Polly.Extensions.Tests/Telemetry/TelemetryListenerImplTests.cs	Uses a primary constructor for a nested test enricher and initializes the callback field inline.
test/Polly.Extensions.Tests/ReloadableResiliencePipelineTests.cs	Converts a test ResilienceStrategy to a primary constructor and inline auto-property initialization.
test/Polly.Extensions.Tests/Issues/IssuesTests.OnCircuitBreakWithServiceProvider_796.cs	Adds trailing commas in switch arms and uses a primary constructor for a nested strategy.
test/Polly.Core.Tests/Issues/IssuesTests.CircuitBreakerStateSharing_959.cs	Uses is constant patterns in switch guards for readability.
src/Snippets/Docs/ResilienceStrategies.cs	Adds a trailing comma to the last switch arm in a docs snippet.
src/Snippets/Docs/Migration.Retry.cs	Simplifies a property pattern and adds trailing commas in a docs snippet switch.
src/Snippets/Docs/HttpClientIntegrations.cs	Adds a trailing comma to the last switch arm in a docs snippet.
src/Snippets/Docs/Extensibility.cs	Uses is constant patterns, adds trailing commas, and normalizes #endregion.
src/Snippets/Docs/Chaos.Outcome.cs	Adds a trailing comma to the last switch arm in a docs snippet.
src/Polly.Core/Utils/Pipeline/BridgeComponentBase.cs	Refactors constructor boilerplate into a primary constructor and inline field initialization.
bench/Polly.Core.Benchmarks/Utils/Helper.Retry.cs	Adds trailing commas to switch arms and object initializer members in benchmark helper code.
bench/Polly.Core.Benchmarks/Utils/Helper.MultipleStrategies.cs	Adds trailing commas in options initializers and switch expressions in benchmark helper code.
bench/Polly.Core.Benchmarks/Utils/Helper.CircuitBreaker.cs	Adds trailing commas in switch expressions and removes a trailing blank line.
bench/Polly.Core.Benchmarks/PredicateBenchmark.cs	Adds a trailing comma after the switch expression in an object initializer.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.16%. Comparing base (8fd8fc0) to head (537cd09).
⚠️ Report is 1 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3018   +/-   ##
=======================================
  Coverage   96.15%   96.16%           
=======================================
  Files         310      310           
  Lines        7135     7136    +1     
  Branches     1005     1005           
=======================================
+ Hits         6861     6862    +1     
  Misses        221      221           
  Partials       53       53           

Flag	Coverage Δ
linux	96.16% <100.00%> (+<0.01%)	⬆️
macos	96.16% <100.00%> (+<0.01%)	⬆️
windows	96.15% <100.00%> (+<0.01%)	⬆️

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