Add reference name for "by" feature in grpc error detail

[goccy]

SSIA

[github-actions]

Code Metrics Report

	main (6240bab)	#223 (fdcd442)	+/-
Coverage	65.1%	65.1%	+0.0%
Code to Test Ratio	1:0.3	1:0.3	-0.0
Test Execution Time	7m10s	7m8s	-2s

Details

  |                     | main (6240bab) | #223 (fdcd442) |  +/-  |
  |---------------------|----------------|----------------|-------|
+ | Coverage            |          65.1% |          65.1% | +0.0% |
  |   Files             |             69 |             69 |     0 |
  |   Lines             |          11792 |          11794 |    +2 |
+ |   Covered           |           7681 |           7683 |    +2 |
- | Code to Test Ratio  |          1:0.3 |          1:0.3 |  -0.0 |
  |   Code              |          37176 |          37179 |    +3 |
  |   Test              |          12668 |          12668 |     0 |
+ | Test Execution Time |          7m10s |           7m8s |   -2s |

Code coverage of files in pull request scope (87.0% → 87.1%)

Files	Coverage	+/-
resolver/def.go	87.1%	+0.1%

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Reported by octocov