fix: incorrect nullability for indexer parameters

[vbreuss]

This PR fixes incorrect nullability annotations for indexer parameters in the verification API. The parameters array was previously marked as nullable (NamedParameter?[]) when it should have been non-nullable (NamedParameter[]), since NamedParameter is a struct and cannot be null.

Key changes:

• Corrected parameter type from NamedParameter?[] to NamedParameter[] in indexer verification methods
• Simplified parameter matching logic by removing unnecessary null checks
• Updated indexer expectation messages to include brackets around parameters for clarity
• Added test coverage for multi-parameter indexer verification scenarios

[Copilot]

Pull request overview

This PR fixes incorrect nullability annotations for indexer parameters in the verification API. The parameters array was previously marked as nullable (NamedParameter?[]) when it should have been non-nullable (NamedParameter[]), since NamedParameter is a struct and cannot be null.

Key changes:

• Corrected parameter type from NamedParameter?[] to NamedParameter[] in indexer verification methods
• Simplified parameter matching logic by removing unnecessary null checks
• Updated indexer expectation messages to include brackets around parameters for clarity
• Added test coverage for multi-parameter indexer verification scenarios

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
Source/Mockolate/Mock.Verify.cs	Updated parameter types in GotIndexer and SetIndexer methods
Source/Mockolate/MockRegistration.Verify.cs	Removed null checks and simplified parameter matching logic for indexer verification
Source/Mockolate/Verify/VerificationResultExtensions.cs	Removed unused code path for IHasMockRegistration
Tests/Mockolate.Tests/Verify/VerificationResultTests.cs	Added tests for multi-parameter indexer verification and updated expectation format
Tests/Mockolate.Api.Tests/Expected/*.txt	Updated API surface snapshots to reflect corrected parameter nullability

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[github-actions]

Test Results

    14 files  ± 0      14 suites  ±0   5m 28s ⏱️ + 1m 5s
 1 685 tests + 2   1 684 ✅ + 2  1 💤 ±0  0 ❌ ±0 
11 252 runs  +14  11 251 ✅ +14  1 💤 ±0  0 ❌ ±0 

Results for commit 0b05560. ± Comparison against base commit 3abcf45.

[github-actions]

🚀 Benchmark Results

Details

BenchmarkDotNet v0.15.8, Linux Ubuntu 24.04.3 LTS (Noble Numbat)

AMD EPYC 7763 2.45GHz, 1 CPU, 4 logical and 2 physical cores

.NET SDK 10.0.101

[Host] : .NET 10.0.1 (10.0.1, 10.0.125.57005), X64 RyuJIT x86-64-v3
Job=InProcess  Toolchain=InProcessEmitToolchain  IterationCount=15

LaunchCount=1  WarmupCount=10

Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
Simple_Mockolate	1.538 μs	0.0222 μs	0.0208 μs	0.2232	-	3.66 KB
Simple_Moq	186.503 μs	0.7412 μs	0.6190 μs	0.4883	-	14.55 KB
Simple_NSubstitute	5.920 μs	0.0422 μs	0.0374 μs	0.5569	0.0076	9.14 KB
Simple_FakeItEasy	6.683 μs	0.0271 μs	0.0240 μs	0.4959	-	8.11 KB

[github-actions]

This is addressed in release v0.45.0.