Fix conflict to generated message name for env or service level variables

[goccy]

Add nested message name to generated message name.

[github-actions]

Code Metrics Report

	main (99ba480)	#272 (c2c40be)	+/-
Coverage	65.3%	65.3%	0.0%
Code to Test Ratio	1:0.3	1:0.3	+0.0
Test Execution Time	7m6s	7m5s	-1s

Details

  |                     | main (99ba480) | #272 (c2c40be) | +/-  |
  |---------------------|----------------|----------------|------|
  | Coverage            |          65.3% |          65.3% | 0.0% |
  |   Files             |             77 |             77 |    0 |
  |   Lines             |          13786 |          13786 |    0 |
  |   Covered           |           9008 |           9008 |    0 |
+ | Code to Test Ratio  |          1:0.3 |          1:0.3 | +0.0 |
  |   Code              |          42256 |          42256 |    0 |
+ |   Test              |          15819 |          15831 |  +12 |
+ | Test Execution Time |           7m6s |           7m5s |  -1s |

Code coverage of files in pull request scope (83.4% → 83.4%)

Files	Coverage	+/-
resolver/resolver.go	83.4%	0.0%

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Reported by octocov