Fix #6871 detect conflicting inferred paging connection types

[michaelstaib]

Fixes #6871

Summary

• adds Issue6871Tests to reproduce conflicting inferred FriendsConnection configuration across two fields
• validates inferred/explicit named connection type signatures during schema construction
• throws a schema error when the same connection type name is reused with conflicting node type or paging-shape flags (IncludeTotalCount / IncludeNodesField)

Test commands and results

• dotnet test src/HotChocolate/Core/test/Types.CursorPagination.Tests/HotChocolate.Types.CursorPagination.Tests.csproj --filter "FullyQualifiedName~Issue6871Tests" --nologo
  • Passed on net8.0, net9.0, net10.0
• dotnet test src/HotChocolate/Core/test/Types.CursorPagination.Tests/HotChocolate.Types.CursorPagination.Tests.csproj --filter "FullyQualifiedName~Issue6871Tests|FullyQualifiedName~IntegrationTests.Explicit_ConnectionName|FullyQualifiedName~IntegrationTests.Infer_ConnectionName_From_Field" --nologo
  • Passed on net8.0, net9.0, net10.0

[github-actions]

Fusion Gateway Performance Results

Simple Composite Query

	Req/s	Err%
Constant 2 (50 VUs)	3321.42	0.00%
Ramping 2 (0-500-0 VUs)	3828.48	0.00%

Response Times

	Min	Med	Avg	P90	P95	Max
Constant 2	1.10ms	12.11ms	14.78ms	24.10ms	33.30ms	259.90ms
Ramping 2	1.29ms	51.97ms	57.31ms	99.99ms	142.73ms	285.33ms

---

Deep Recursion Query

	Req/s	Err%
Constant 2 (50 VUs)	767.75	0.00%
Ramping 2 (0-500-0 VUs)	915.17	0.00%

Response Times

	Min	Med	Avg	P90	P95	Max
Constant 2	9.44ms	56.20ms	62.84ms	80.03ms	98.67ms	814.37ms
Ramping 2	2.90ms	208.02ms	225.83ms	459.98ms	514.36ms	988.16ms

---

Variable Batching Throughput

	Req/s	Err%
Constant 2 (50 VUs)	7080.59	0.00%
Ramping 2 (0-500-0 VUs)	5798.86	0.00%

Response Times

	Min	Med	Avg	P90	P95	Max
Constant 2	0.11ms	6.47ms	6.98ms	11.64ms	15.26ms	47.97ms
Ramping 2	0.14ms	34.80ms	39.64ms	72.79ms	105.07ms	232.25ms

---

Runner 2 = benchmarking-2

Run 22495833831 • Commit 3a5594d • Fri, 27 Feb 2026 17:13:11 GMT