DBヘルスチェック追加

[o-ga09]

close #70

[github-actions]

Code Metrics Report

	main (97e3bd1)	#69 (fc08b27)	+/-
Coverage	1.2%	0.0%	-1.2%
Code to Test Ratio	1:0.0	1:0.0	-0.0
Test Execution Time	32s	35s	+3s

Details

  |                     | main (97e3bd1) | #69 (fc08b27) |  +/-  |
  |---------------------|----------------|---------------|-------|
- | Coverage            |           1.2% |          0.0% | -1.2% |
  |   Files             |             37 |            39 |    +2 |
  |   Lines             |            253 |           242 |   -11 |
- |   Covered           |              3 |             0 |    -3 |
- | Code to Test Ratio  |          1:0.0 |         1:0.0 |  -0.0 |
  |   Code              |           2441 |          2334 |  -107 |
- |   Test              |             30 |             0 |   -30 |
- | Test Execution Time |            32s |           35s |   +3s |

Code coverage of files in pull request scope (0.0% → 0.0%)

Files	Coverage	+/-
app/internal/DI/health.go	0.0%	0.0%
app/internal/controller/system.go	0.0%	0.0%
app/internal/driver/mysql/db_connect.go	0.0%	0.0%
app/internal/driver/mysql/health.go	0.0%	0.0%
app/internal/presenter/middleware/logger.go	0.0%	0.0%
app/internal/presenter/server.go	0.0%	0.0%
app/internal/service/health/health.go	0.0%	0.0%
app/internal/util/util.go	0.0%	0.0%
app/pkg/config.go	0.0%	0.0%

---

Reported by octocov