Add Kanban task 037 for MediatR to TimeWarp.Mediator migration

Created task to migrate from MediatR to TimeWarp.Mediator, focusing on package reference and global usings changes since TimeWarp.Mediator is a fork of the Apache 2 licensed version. Includes requirement to create migration documentation with notes.

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

Author: StevenTCramer

TimeWarp.Architecture/Kanban/ToDo/037_Migrate-From-MediatR-To-TimeWarp-Mediator.md

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+# 037 Migrate From MediatR To TimeWarp.Mediator
+
+## Description
+
+Migrate the codebase from using MediatR to TimeWarp.Mediator. Since TimeWarp.Mediator is a fork of Mediator (forked at the last Apache 2 license commit before it went commercial), this should be a straightforward migration involving mainly package references and global usings changes. Create a migration document with notes during the process.
+
+## Requirements
+
+- Replace all MediatR package references with TimeWarp.Mediator
+- Update global usings to reference TimeWarp.Mediator namespaces
+- Create comprehensive migration documentation with notes and lessons learned
+- Ensure all existing functionality continues to work after migration
+- Verify all tests pass after migration
+
+## Checklist
+
+### Design
+- [ ] Analyze current MediatR usage patterns across the solution
+- [ ] Identify all package references and global usings to update
+- [ ] Plan migration strategy focusing on package refs and usings
+
+### Implementation
+- [ ] Update package references in all .csproj files
+- [ ] Update global usings files to reference TimeWarp.Mediator namespaces
+- [ ] Update any explicit using statements if needed
+- [ ] Update dependency injection registrations if namespace changes affect them
+- [ ] Run build to verify no compilation errors
+- [ ] Run all tests to ensure functionality is maintained
+
+### Documentation
+- [ ] Create migration document with step-by-step notes
+- [ ] Document any issues encountered and solutions
+- [ ] Update CLAUDE.md references from MediatR to TimeWarp.Mediator
+- [ ] Document benefits of using TimeWarp.Mediator over MediatR
+
+## Notes
+
+- TimeWarp.Mediator is a fork of Mediator (not MediatR) from the last Apache 2 license commit
+- This should be primarily a package reference and namespace change
+- The migration document should serve as a guide for future similar migrations
+- Pay attention to any subtle differences between the forked version and original
+- Document the reasoning behind the fork (commercial licensing issue)