refactor: simplify Callback class

[vbreuss]

This PR simplifies the Callback class by removing redundant increment operations and adds comprehensive test coverage for callback limiting behavior in parallel and sequential scenarios.

Key Changes:

• Removed unnecessary counter increments (_forIterationCount and _matchingCount) from three Invoke method overloads in the Callback class
• Merged and inverted the if-conditions
• Added test cases to verify index increment behavior when For limits are exhausted
• Added test case to verify execution limiting when running callbacks in parallel

[Copilot]

Pull request overview

This PR simplifies the Callback class by removing redundant increment operations and adds comprehensive test coverage for callback limiting behavior in parallel and sequential scenarios.

Changes:

• Removed duplicate counter increments (_forIterationCount and _matchingCount) from three Invoke method overloads in the Callback class
• Added test cases to verify index increment behavior when For limits are exhausted
• Added test case to verify execution limiting when running callbacks in parallel

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
Source/Mockolate/Setup/Callback.cs	Removed duplicate counter increment statements from Invoke method overloads
Tests/Mockolate.Internal.Tests/CallbackTests.cs	Added test coverage for For limit exhaustion and parallel execution limiting

[github-actions]

Test Results

    21 files  ± 0      21 suites  ±0   5m 48s ⏱️ -10s
 2 513 tests + 5   2 512 ✅ + 5  1 💤 ±0  0 ❌ ±0 
16 856 runs  +21  16 855 ✅ +21  1 💤 ±0  0 ❌ ±0 

Results for commit 090176f. ± Comparison against base commit 11bf57a.

♻️ This comment has been updated with latest results.

[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 10.0.102

[Host] : .NET 10.0.2 (10.0.2, 10.0.225.61305), X64 RyuJIT x86-64-v3
Job=InProcess  Toolchain=InProcessEmitToolchain  IterationCount=15

LaunchCount=1  WarmupCount=10

Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
Simple_Mockolate	1.488 μs	0.0075 μs	0.0059 μs	0.2270	-	3.73 KB
Simple_Moq	179.011 μs	0.9996 μs	0.9350 μs	0.4883	-	14.55 KB
Simple_NSubstitute	5.744 μs	0.0723 μs	0.0676 μs	0.5493	0.0076	9.09 KB
Simple_FakeItEasy	6.255 μs	0.0589 μs	0.0551 μs	0.4959	-	8.11 KB

[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]

This is addressed in release v1.2.0.