feat(spans): Extract metrics for file spans (#2874)

Co-authored-by: Joris Bayer <[email protected]>

Author: phacops

CHANGELOG.md

@@ -5,6 +5,7 @@
 **Internal**:
 
 - Use a Lua script and in-memory cache for the cardinality limiting to reduce load on Redis. ([#2849](https://github.com/getsentry/relay/pull/2849))
+- Extract metrics for file spans. ([#2874](https://github.com/getsentry/relay/pull/2874))
 - Add an internal endpoint that allows Relays to submit metrics from multiple projects in a single request. ([#2869](https://github.com/getsentry/relay/pull/2869))
 - Emit a `processor.message.duration` metric to assess the throughput of the internal CPU pool. ([#2877](https://github.com/getsentry/relay/pull/2877))
 

relay-dynamic-config/src/defaults.rs

@@ -63,6 +63,7 @@ pub fn add_span_metrics(project_config: &mut ProjectConfig) {
         (
             RuleCondition::eq("span.op", "http.client")
                 | RuleCondition::glob("span.op", MOBILE_OPS)
+                | RuleCondition::glob("span.op", "file.*")
                 | (RuleCondition::glob("span.op", "db*") & !is_disabled & !is_mongo)
                 | resource_condition.clone(),
             resource_condition,