Add Priority 3 matching logic that allows User type users to override
material assignments with their own typeKeywords from MaterialsTypeToBeDeleted.
Changes:
- Add session manager integration to get current user context
- Implement Priority 3: User Override Match (only for non-admin users)
- Filter typeKeywords by current username and force override on match
- Maintain existing Priority 1 (exact match) and Priority 2 (type match) behavior
- Admin users bypass override logic and see original matching results
- Update cleaner-validation-flow.md with new matching algorithm flow
This ensures User users see materials assigned to themselves first when
their configured typeKeywords match, while Admin users maintain full visibility.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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