fix(core-api): wallet search

[spkjp]

A summary of what changes this PR introduces and why they were made.

What kind of change does this PR introduce?

• Bugfix
• Feature
• Refactor
• Performance
• Tests
• Build
• Documentation
• Code style update
• Continuous Integration
• Other, please describe:

Does this PR introduce a breaking change?

• Yes
• No

Does this PR release a new version?

• Yes
• No

If yes, please describe the impact and migration path for existing applications:

The PR fulfills these requirements:

• It's submitted to the develop branch, not the master branch
• All tests are passing
• New/updated tests are included

If adding a new feature, the PR's description includes:

• A convincing reason for adding this feature (to avoid wasting your time, it's best to open a suggestion issue first and wait for approval before working on it)

[codecov-io]

Codecov Report

Merging #2926 into develop will decrease coverage by <.01%.
The diff coverage is 67.74%.

@@             Coverage Diff             @@
##           develop    #2926      +/-   ##
===========================================
- Coverage    68.12%   68.12%   -0.01%     
===========================================
  Files          406      406              
  Lines         9795     9819      +24     
  Branches       510      469      -41     
===========================================
+ Hits          6673     6689      +16     
- Misses        3079     3091      +12     
+ Partials        43       39       -4

Impacted Files	Coverage Δ
...transactions/src/handlers/delegate-registration.ts	43.63% <ø> (ø)	⬆️
packages/core-api/src/handlers/delegates/schema.ts	100% <ø> (ø)	⬆️
...ges/core-api/src/handlers/delegates/transformer.ts	85.71% <ø> (ø)	⬆️
...-transactions/src/handlers/delegate-resignation.ts	68.75% <0%> (-4.59%)	⬇️
.../core-api/src/handlers/transactions/transformer.ts	100% <100%> (ø)	⬆️
...kages/core-api/src/handlers/wallets/transformer.ts	100% <100%> (ø)	⬆️
...se/src/repositories/wallets-business-repository.ts	96.29% <100%> (+0.29%)	⬆️
packages/core-state/src/wallets/wallet-manager.ts	89.17% <100%> (+0.34%)	⬆️
.../src/repositories/delegates-business-repository.ts	73.17% <44.44%> (-6.25%)	⬇️
...re-database/src/repositories/utils/sort-entries.ts	87.5% <71.42%> (-12.5%)	⬇️
... and 5 more

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