fix(ada):token recovery build

[dgm003]

Ticket: CSHLD-133

Description

Recovery transactions for ADA wallets holding native tokens were dropping
the tokens entirely, producing only a single ADA output instead of the
expected token output + ADA remainder output.

Root cause: 'recover()' function in 'ada.ts' called 'changeAddress()' without
passing the token asset list from the UTXO set, so the transaction builder
had no knowledge of tokens. Additionally, the 'buildImplementation()' gate
in 'transactionBuilder.ts' did not route token recovery into the refactored
build path ('processTokenBuild') which handles token outputs correctly.

Fix:

• Aggregate 'asset_list' from all UTxOs in 'recover()' into a
  fingerprint-keyed map and pass it as the 3rd argument to 'changeAddress()'
• Call 'txBuilder.isTokenTransaction()' when the aggregated asset list is
  non-empty, so the builder routes through 'processTokenBuild()' →
  'addChangeOutput()' which produces both a token output (1.5 ADA + tokens)
  and an ADA remainder output

Issue Number

CSHLD-133

Type of change

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

Added two unit tests in test/unit/ada.ts:

• ADA-only recovery — asserts 1 output, correct ADA amount, no multiAssets
• ADA + token recovery — asserts 2 outputs: one token output (1.5 ADA +
  correct token quantity/policy) and one ADA remainder output (totalBalance - minADA - fee)

Ran locally with:
npx mocha
All the 160 test cases passed.

[sachushaji]

@claude