feat(sdk-core): add XdcStakeOptions with kycHash for XDC masternode

Add XdcStakeOptions extending StakeOptions with an optional kycHash
field, following the same pattern as TaoStakeOptions and VetStakeOptions.

The kycHash carries the IPFS CIDv0 returned by the staking-service KYC
upload endpoint before calling stake(). stakingWallet.stake() spreads
all options into the POST body, so no further changes are needed.

Ticket: SC-6159

Author: Doddanna17

modules/sdk-core/src/bitgo/staking/iStakingWallet.ts

@@ -164,6 +164,14 @@ export interface StakeOptions {
   region?: string;
 }
 
+export interface XdcStakeOptions extends StakeOptions {
+  /**
+   * XDC masternode KYC document hash — IPFS CIDv0 (Qm...) returned by the
+   * staking-service KYC upload endpoint, injected before calling stake().
+   */
+  kycHash?: string;
+}
+
 export interface TronStakeOptions extends StakeOptions {
   /**
    * Tron staking resource type (Energy or Bandwidth)
@@ -311,7 +319,7 @@ export interface IStakingWallet {
   readonly walletId: string;
   readonly coin: string;
   stake(
-    options: StakeOptions | TronStakeOptions | TaoStakeOptions | VetStakeOptions | StoryStakeOptions
+    options: StakeOptions | TronStakeOptions | TaoStakeOptions | VetStakeOptions | StoryStakeOptions | XdcStakeOptions
   ): Promise<StakingRequest>;
   unstake(options: UnstakeOptions | EthUnstakeOptions): Promise<StakingRequest>;
   switchValidator(options: SwitchValidatorOptions | TaoSwitchValidatorOptions): Promise<StakingRequest>;

modules/sdk-core/src/bitgo/staking/stakingWallet.ts

@@ -25,6 +25,7 @@ import {
   TaoSwitchValidatorOptions,
   VetStakeOptions,
   StoryStakeOptions,
+  XdcStakeOptions,
 } from './iStakingWallet';
 import { BitGoBase } from '../bitgoBase';
 import { IWallet, PrebuildTransactionResult } from '../wallet';
@@ -63,7 +64,7 @@ export class StakingWallet implements IStakingWallet {
    * @return StakingRequest
    */
   async stake(
-    options: StakeOptions | TronStakeOptions | TaoStakeOptions | VetStakeOptions | StoryStakeOptions
+    options: StakeOptions | TronStakeOptions | TaoStakeOptions | VetStakeOptions | StoryStakeOptions | XdcStakeOptions
   ): Promise<StakingRequest> {
     return await this.createStakingRequest(options, 'STAKE');
   }
@@ -325,7 +326,8 @@ export class StakingWallet implements IStakingWallet {
       | TaoStakeOptions
       | TaoSwitchValidatorOptions
       | VetStakeOptions
-      | StoryStakeOptions,
+      | StoryStakeOptions
+      | XdcStakeOptions,
     type: string
   ): Promise<StakingRequest> {
     return await this.bitgo