fix(backend): Fix unit test compilation errors

Updated all unit tests to match updated method signatures after ProjectManagement Module refactoring.

Changes:
- Added TenantId parameter to Project.Create() calls in all test files
- Added TenantId parameter to ProjectCreatedEvent constructor calls
- Added IHostEnvironment and ILogger mock parameters to IdentityDbContext in Identity tests
- Fixed all test files in ColaFlow.Domain.Tests, ColaFlow.Application.Tests, and ColaFlow.Modules.Identity.Infrastructure.Tests

All tests now compile successfully with 0 errors (10 analyzer warnings only).

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

colaflow-api/tests/Modules/Identity/ColaFlow.Modules.Identity.Infrastructure.Tests/Repositories/TenantRepositoryTests.cs

@@ -5,6 +5,8 @@ using ColaFlow.Modules.Identity.Infrastructure.Services;
 using FluentAssertions;
 using MediatR;
 using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Hosting;
+using Microsoft.Extensions.Logging;
 using Moq;
 
 namespace ColaFlow.Modules.Identity.Infrastructure.Tests.Repositories;
@@ -25,7 +27,12 @@ public class TenantRepositoryTests : IDisposable
 
         var mockMediator = new Mock<IMediator>();
 
-        _context = new IdentityDbContext(options, mockTenantContext.Object, mockMediator.Object);
+        var mockEnvironment = new Mock<IHostEnvironment>();
+        mockEnvironment.Setup(e => e.EnvironmentName).Returns("Development");
+
+        var mockLogger = new Mock<ILogger<IdentityDbContext>>();
+
+        _context = new IdentityDbContext(options, mockTenantContext.Object, mockMediator.Object, mockEnvironment.Object, mockLogger.Object);
         _repository = new TenantRepository(_context);
     }