test: add integration test coverage for SDK bump regressions (WAL-1484)

Five gaps identified during manual SDK bump regression testing that would
go undetected by CI without these changes:

1. eddsa.test.ts — fix wrong coin in test fixture (tsol → tnear) so the
   test actually exercises the EdDSA key finalization path it claims to cover

2. recoveryWallet.test.ts — add ETH happy path test; ETH recovery calls
   recover() on the coin object directly rather than building a PSBT and
   hits a different AWM endpoint shape, so a regression there was invisible

3. mpcFinalize.test.ts — add backup source finalization test; the handler
   dispatches on source='user' vs source='backup' to set party indexes and
   signing material field names — only the user path was tested before

4. recoveryConsolidationsWallet.test.ts — replace Prototype-level sinon stubs
   with nock HTTP interceptors so the real AdvancedWalletManagerClient code
   path (URL routing, body serialization, codec decoding) is exercised; adds
   body capture assertions so URL/shape regressions are caught

5. consolidate.test.ts — add walletPubs argument verification on the signing
   function call; a regression that dropped walletPubs would silently pass
   because the stub accepts any args

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: pranishnepal