Implementing Advanced Dependency Injection with Provide/Inject and Symbols

Using Symbols as keys for provide/inject prevents naming collisions and enforces a strict architectural contract.

In large-scale apps, string-based keys for provide are risky as they can be overwritten by other plugins or components. By using unique Symbols exported from a constants file, you ensure that the injected dependency is exactly what the consumer expects. This pattern is often used for 'Plugin' architectures where multiple independent modules contribute to a core app.