⚠️ Transient, Scoped, and Singleton — small choices with a big impact on performance, scalability, and data safety.

🔹 Transient
Creates a new instance every time it’s requested.
Best suited for lightweight, stateless services.

🔹 Scoped
One instance per request.
Shared only within the same user operation.

🔹 Singleton
A single instance for the entire application lifetime.
Shared by all users and must be thread-safe.

Rule of thumb:
Stateless → Transient
Per request → Scoped
Global shared → Singleton