Remove remaining status_id references after in_progress migration

- Remove Preload("Status") from worker handler and repositories
- Update seeds to use in_progress boolean instead of status_id
- Remove task_taskstatus table creation from lookup seeds
- Update documentation to reflect in_progress boolean pattern

Fixes notification worker error:
"Status: unsupported relations for schema Task"

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

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

internal/repositories/contractor_repo.go

@@ -105,7 +105,6 @@ func (r *ContractorRepository) GetTasksForContractor(contractorID uint) ([]model
 	var tasks []models.Task
 	err := r.db.Preload("Category").
 		Preload("Priority").
-		Preload("Status").
 		Where("contractor_id = ?", contractorID).
 		Order("due_date ASC NULLS LAST").
 		Find(&tasks).Error

internal/repositories/residence_repo.go

@@ -316,7 +316,6 @@ func (r *ResidenceRepository) GetTasksForReport(residenceID uint) ([]models.Task
 	err := r.db.
 		Preload("Category").
 		Preload("Priority").
-		Preload("Status").
 		Preload("Completions").
 		Preload("Completions.Images").
 		Preload("Completions.CompletedBy").