feat(users): Enhance profile picture upload with avatar cleanup #173

Job	Run time
Security & Code Quality	1m 30s
Test Suite	55s
Build & Performance	4m 5s
Database Tests	1m 22s
Enhanced Security Testing	4m 51s
Deploy to Staging	0s
Rollback on Failure	0s
Performance Monitoring (Staging)	0s
Deploy to Production	0s
Performance Monitoring	0s
	12m 43s

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