feat(defi): implement dynamic protocol adapter registry and auto-disc…

[shadrach68]

• closes Align defi Module — Protocol Adapter Registry & Strategy Discovery #9

Description

This PR refactors the DeFi protocol adapter registration process to use a dynamic discovery mechanism. Previously, adding a new protocol required manual wiring and constructor updates. This update introduces a plugin-like architecture, allowing the application to auto-discover and expose adapters cleanly.

Changes Made

• Dynamic Registry: Refactored ProtocolRegistry to allow runtime registration of adapters via a generic register() method and introduced the ProtocolAdapterMetadata interface.
• Auto-Discovery: Updated DeFiModule to leverage NestJS's DiscoveryService. It now automatically scans and registers any provider implementing the ProtocolAdapter interface during the onModuleInit lifecycle hook.
• API Exposure: Added a new GET /defi/protocols endpoint in DeFiController that returns a list of all currently supported protocols. It dynamically calculates capabilities based on implemented methods (e.g., borrow, stake, swap).

Impact

Adding a new protocol (e.g., Uniswap, Yearn) to the DeFi module is now completely plug-and-play. Developers only need to:

1. Create the adapter class.
2. Add the adapter to the DeFiModule providers array.
   No changes to the registry class or module constructors are required.

Testing

• Verified AaveAdapter and CompoundAdapter are automatically discovered and registered on application start.
• Confirmed GET /defi/protocols correctly returns the metadata and capabilities of all registered adapters.