fix(metric): missing import to define TestLogger

Author: Alenar

internal/mithril-metric/Cargo.toml

@@ -22,6 +22,7 @@ slog = { workspace = true }
 tokio = { workspace = true }
 
 [dev-dependencies]
+mithril-common = { path = "../../mithril-common", features = ["test_tools"] }
 prometheus-parse = "0.2.5"
 slog-async = { workspace = true }
 slog-term = { workspace = true }