fix: log search error if error code is present

[cheb0]

Description

Log search error if error code is present. Currently we do not log errors like SearchErrorCode_TOO_MANY_FRACTION_TOKENS and SearchErrorCode_MEMORY_LIMIT_EXCEEDED, but happily log parser errors in this log.

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[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 70.42%. Comparing base (8d40146) to head (b813e95).

Files with missing lines	Patch %	Lines
storeapi/grpc_search.go	0.00%	3 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #468      +/-   ##
==========================================
- Coverage   70.45%   70.42%   -0.04%     
==========================================
  Files         232      232              
  Lines       18364    18368       +4     
==========================================
- Hits        12939    12935       -4     
- Misses       4450     4458       +8     
  Partials      975      975              

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[github-actions]

🔴 Performance Degradation

Some benchmarks have degraded compared to the previous run.
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Name	Previous	Current	Ratio	Verdict
Indexer-4	8d4014	2ae6a7
	572462538.00 B/op	775659670.00 B/op	1.35	🔴