Fixing the string representation.

Author: angelosantos4

nodestream/metrics.py

@@ -29,7 +29,7 @@ def register(self, handler: "MetricHandler"):
         return self
 
     def __str__(self):
-        return f"{self.name}: {self.value}"
+        return self.name
 
     def __hash__(self):
         return hash(self.name)

tests/unit/test_metrics.py

@@ -152,6 +152,11 @@ def test_metric_equality_and_hash():
     assert metric1 == metric2  # Same name
     assert metric1 != metric3  # Different name
 
+    # Test __str__
+    assert str(metric1) == "test_metric"
+    assert str(metric2) == "test_metric"
+    assert str(metric3) == "different_metric"
+
     # Test __hash__
     assert hash(metric1) == hash(metric2)  # Same name should have same hash