feat(sdk-core): bulk TRX resource delegation SDK + Express layer

[bhavidhingra]

Summary

Resource Delegation

• Adds buildResourceDelegations, sendResourceDelegation, sendResourceDelegations to Wallet and IWallet
• buildResourceDelegations: POSTs to /:coin/wallet/:id/delegateResources/build, post-processes prebuilds
• sendResourceDelegation: dispatches per wallet type — TSS → sendManyTxRequests, custodial → initiateTransaction, hot → prebuildAndSignTransaction + submitTransaction
• sendResourceDelegations: validates passphrase, builds all, sends sequentially, collects { success, failure }
• Adds typed Express route (PostDelegateResources) and handleV2DelegateResources handler with partial-success 202/400 response logic

Resource Undelegation

• Adds buildResourceUndelegations, sendResourceUndelegation, sendResourceUndelegations to Wallet and IWallet — mirrors delegation API exactly
• buildResourceUndelegations: POSTs to /:coin/wallet/:id/undelegateResources/build
• Adds typed Express route (PostUndelegateResources) and handleV2UndelegateResources handler
• Delegation and undelegation share private helpers (buildResourceManagements, sendResourceManagement, sendResourceManagements) to eliminate code duplication

stakingParams relay

• Adds stakingParams?: unknown to PrebuildTransactionResult so staking metadata flows from the build response through to submitTransaction, enabling the indexer to identify resource management transfers correctly

Test plan

• Unit test: buildResourceDelegations / buildResourceUndelegations call the right endpoints and post-process prebuilds
• Unit test: sendResourceDelegation / sendResourceUndelegation route correctly per wallet type
• Express: POST /api/v2/ttrx/wallet/:id/delegateResources returns 200/202/400 as appropriate
• Express: POST /api/v2/ttrx/wallet/:id/undelegateResources returns 200/202/400 as appropriate

Linear: CHALO-287

[linear]

CHALO-287 Bulk TRX Resource Delegation API

[bhavidhingra]

@claude review

[pranavjain97]

Flush, please request re-review when ready for review.