add aave and tokenAllowance passthroughs

[tmcollins4]

Description

Added BWS passthrough routes for Aave endpoints and token allowance, following the existing BWS → V8 → BCN pattern. These allow the app/client to access Aave data and token allowance checks through BWS (via BWC).

Changelog

• Added AaveRouter in packages/bitcore-wallet-service/src/lib/routes/aave.ts following the TssRouter pattern for route organization.
• Added POST /bws/api/v1/service/aave/userAccountData — returns Aave user health factor, collateral, debt data, etc.
• Added POST /bws/api/v1/service/aave/reserveData — returns Aave reserve data (variable borrow rate, etc.).
• Added POST /bws/api/v1/service/aave/reserveTokensAddresses — returns Aave reserve token addresses (aToken, variableDebtToken, etc.).
• Added POST /bws/api/v1/token/allowance — returns ERC20 token allowance for a given owner/spender pair.
• Added V8 methods getAaveUserAccountData, getAaveReserveData, getAaveReserveTokensAddresses in v8.ts.
• Added WalletService methods getAaveUserAccountData, getAaveReserveData, getAaveReserveTokensAddresses, getTokenAllowance in server.ts.
• All routes use getServerWithAuth consistent with existing passthrough endpoints like /v1/token/info.
• Added 4 unit tests in v8.test.ts covering all new V8 methods.
• Added 4 unit tests in expressapp.test.ts covering all new routes.

Testing Notes

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Checklist

• I have read CONTRIBUTING.md and verified that this PR follows the guidelines and requirements outlined in it.

[Copilot]

Pull request overview

Adds new Bitcore Wallet Service (BWS) passthrough endpoints to expose Aave data and ERC20 token allowance via the existing BWS → V8 pattern, along with corresponding WalletService/V8 plumbing and tests.

Changes:

• Added AaveRouter and mounted new /v1/service/aave/* POST routes.
• Added /v1/token/allowance POST route plus a WalletService.getTokenAllowance passthrough.
• Added V8 explorer methods for Aave endpoints and unit tests for the new routes/methods.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
packages/bitcore-wallet-service/src/lib/routes/aave.ts	Introduces AaveRouter implementing the new Aave passthrough endpoints.
packages/bitcore-wallet-service/src/lib/expressapp.ts	Wires up AaveRouter and adds the /v1/token/allowance route.
packages/bitcore-wallet-service/src/lib/server.ts	Adds WalletService passthrough methods for Aave and token allowance.
packages/bitcore-wallet-service/src/lib/blockchainexplorers/v8.ts	Adds V8 client methods to call V8 Aave endpoints.
packages/bitcore-wallet-service/test/v8.test.ts	Adds unit tests for the new V8 methods (including token allowance).
packages/bitcore-wallet-service/test/expressapp.test.ts	Adds route tests for Aave endpoints and /v1/token/allowance.

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[kajoseph]

We should

• in server.ts, add some types and/or JSDocs as well as input validation
• add methods to BWC to further improve ergonomics

[kajoseph]

Should add some validation to opts, and maybe a param type or at least JSDoc to this fn as well. Something like

    if (!checkRequired(opts, ['chain', 'network', 'tokenAddress', 'ownerAddress', 'spenderAddress'])) {
      throw new Error('Missing required parameters');
    }