Why did Joseph send messengers to Pharaoh instead of personally asking permission to bury his father in the Land of Israel?

A source-based Torah discussion of the question: Why did Joseph send messengers to Pharaoh instead of personally asking permission to bury his father in the Land of Israel? This localized discovery layer presents the canonical issue for search and study without adding a new practical ruling. The author-fidelity publication clearance is preserved, while the full Hebrew source remains the controlling text for its reasoning, qualifications and conclusion.