Microsoft.Identity.Client.Extensibility.MsalMetricsCatalog
Describes the OpenTelemetry metrics that MSAL emits and, for each metric, the canonical
(MSAL-owned) tag names it records. Consumers such as downstream metric pipelines can use
CanonicalTagsByMetric to discover which tags belong to a given MSAL metric and,
for example, keep only those tags.
Maps each MSAL metric name to the read-only list of canonical tag names that metric records.
Keys are compared with Ordinal.