Add field documentation to Model type

Author: moodmosaic

contrib/core-contract-tests/tests/sip-031/commands/types.ts

@@ -9,12 +9,20 @@ export type Real = {
 };
 
 export interface Model {
+  // Total STX balance currently held by SIP-031.
   balance: bigint;
+  // Current block height used for vesting calculations.
   blockHeight: bigint;
+  // SIP-031 constants including vesting parameters and error codes.
   constants: typeof contracts.sip031.constants;
+  // Block height that marks when vesting becomes active.
   deployBlockHeight: bigint;
+  // Flag indicating whether the initial funding has been transferred.
   initialized: boolean;
+  // Current recipient address eligible to claim STX and update the recipient.
   recipient: string;
+  // Running total of all STX that have been claimed from the contract.
   totalClaimed: bigint;
+  // Map tracking command execution statistics for reporting purposes.
   statistics: Map<string, number>;
 }