test(backend): cover step 17 modules and extract stubs

Add tests for partnership workflow, middleman adaptation and idea notifications; extract reusable test stubs into separate files; add architecture guard forbidding object-valued dictionaries in data contracts.

tests/TarninaHub.Tests/Controllers/InnovationsControllerTests.cs

@@ -5,6 +5,7 @@ using TarninaHub.Application.Abstractions;
 using TarninaHub.Application.Dtos;
 using TarninaHub.Controllers;
 using TarninaHub.Tests.Matchmaking;
+using TarninaHub.Tests.Stubs;
 
 namespace TarninaHub.Tests.Controllers;
 
@@ -12,7 +13,10 @@ public class InnovationsControllerTests
 {
     private static InnovationsController CreateController(IInnovationService service)
     {
-        var controller = new InnovationsController(service, new StubMatchmakingService());
+        var controller = new InnovationsController(
+            service,
+            new StubMatchmakingService(),
+            new StubTestFeedbackService());
         var identity = new ClaimsIdentity(
             [new Claim("sub", "user:tester"), new Claim("role", "admin")],
             authenticationType: "test");
@@ -55,37 +59,4 @@ public class InnovationsControllerTests
 
         Assert.IsType<CreatedAtActionResult>(result.Result);
     }
-
-    private sealed class StubInnovationService : IInnovationService
-    {
-        public Task<IReadOnlyList<InnovationResponse>> ListAsync(
-            string? challengeId,
-            string? stage,
-            string? query,
-            bool onlyPublished,
-            CancellationToken cancellationToken) => Task.FromResult<IReadOnlyList<InnovationResponse>>([]);
-
-        public Task<InnovationResponse?> GetAsync(string innovationId, CancellationToken cancellationToken) =>
-            Task.FromResult<InnovationResponse?>(null);
-
-        public Task<InnovationResponse> CreateAsync(
-            InnovationRequest request,
-            CancellationToken cancellationToken) => Task.FromResult(new InnovationResponse(
-                "innovation:new",
-                request.Title,
-                request.Summary ?? string.Empty,
-                request.Description ?? string.Empty,
-                request.ChallengeId,
-                request.Stage,
-                request.Cost,
-                request.Contact,
-                request.Media ?? [],
-                request.Published,
-                DateTimeOffset.UtcNow));
-
-        public Task<InnovationResponse?> UpdateAsync(
-            string innovationId,
-            InnovationRequest request,
-            CancellationToken cancellationToken) => Task.FromResult<InnovationResponse?>(null);
-    }
 }