ferruzzi commented on code in PR #61079:
URL: https://github.com/apache/airflow/pull/61079#discussion_r2734271590


##########
shared/observability/src/airflow_shared/observability/metrics/stats.py:
##########
@@ -29,6 +30,36 @@
 
 log = logging.getLogger(__name__)
 
+_VALID_STAT_NAME_CHARS_RE = re.compile(r"^[a-zA-Z0-9_.-]+$")
+_INVALID_STAT_NAME_CHARS_RE = re.compile(r"[^a-zA-Z0-9_.-]")

Review Comment:
   I know this is copypasta, but the StatsD and OTel metric names have 
different sets of allowed characters.  The OTel list are in 
https://github.com/apache/airflow/blob/main/shared/observability/src/airflow_shared/observability/metrics/validators.py#L47



##########
airflow-core/tests/unit/dag_processing/test_manager.py:
##########
@@ -734,11 +733,20 @@ def test_send_file_processing_statsd_timing(
             manager = DagFileProcessorManager(max_runs=1)
             manager.run()
 
-        last_runtime = 
manager._file_stats[os.fspath(path_to_parse)].last_duration
+        file_info = DagFileInfo(
+            bundle_name="testing",
+            rel_path=Path("temp_dag.py"),

Review Comment:
   Should this maybe be using path_to_parse instead of a magic string that may 
drift over time?



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