chore: update DBIS contracts and integrate EIP-712 helper

- Updated DBIS_ConversionRouter and DBIS_SettlementRouter to utilize IDBIS_EIP712Helper for EIP-712 hashing and signature recovery, improving stack depth management.
- Refactored minting logic in DBIS_GRU_MintController to streamline recipient processing.
- Enhanced BUILD_NOTES.md with updated build instructions and test coverage details.
- Added new functions in DBIS_SignerRegistry for duplicate signer checks and active signer validation.
- Introduced a new submodule, DBIS_EIP712Helper, to encapsulate EIP-712 related functionalities.

Made-with: Cursor

services/token-aggregation/src/api/middleware/__mocks__/cache.ts

@@ -1,3 +1,4 @@
+// eslint-disable-next-line @typescript-eslint/no-unused-vars -- mock middleware
 export function cacheMiddleware(_ttl?: number) {
   return (req: unknown, res: unknown, next: () => void) => next();
 }

services/token-aggregation/src/api/middleware/cache.ts

@@ -1,7 +1,7 @@
 import { Request, Response, NextFunction } from 'express';
 
 interface CacheEntry {
-  data: any;
+  data: unknown;
   expiresAt: number;
 }
 
@@ -21,7 +21,7 @@ export function cacheMiddleware(ttl: number = DEFAULT_TTL) {
     const originalJson = res.json.bind(res);
 
     // Override json method to cache response
-    res.json = function (body: any) {
+    res.json = function (body: unknown) {
       cache.set(key, {
         data: body,
         expiresAt: Date.now() + ttl,