docs: added comment explaining bigint-buffer-guard.ts

Ticket: DX-1549

Author: tanjeemh

modules/sdk-coin-sol/src/bigint-buffer-guard.ts

@@ -1,3 +1,6 @@
+// Added a lightweight runtime guard for BigInt<->Buffer conversions in @bitgo/sdk-coin-sol (bigint-buffer-guard.ts) to validate input lengths and reduce misuse risk.
+// It's purpose is to enforce input type/length checks around BigInt buffer operations; imported it so validations run at module load
+
 try {
   const mod = require('bigint-buffer');
   const le = typeof mod.toBigIntLE === 'function' ? mod.toBigIntLE : undefined;

package.json

@@ -99,7 +99,9 @@
     "**/swarm-js/**/ws": "5.2.4",
     "serialize-javascript": "^6.0.2",
     "@grpc/grpc-js": "^1.12.6",
-    "bigint-buffer": "npm:@trufflesuite/[email protected]"
+    "bigint-buffer": "npm:@trufflesuite/[email protected]",
+    "request": "npm:@cypress/[email protected]",
+    "**/avalanche/store2": "2.14.4"
   },
   "workspaces": [
     "modules/*"