[Docs site] Add observability (#25305)

* [Docs site] Add observability

* Update wrangler.toml

Co-authored-by: Greg Brimble <[email protected]>

* Update wrangler.toml

Co-authored-by: Daniel Walsh <[email protected]>

---------

Co-authored-by: Greg Brimble <[email protected]>
Co-authored-by: Nevi Shah <[email protected]>
Co-authored-by: Daniel Walsh <[email protected]>

Author: 4 people

wrangler.toml

@@ -20,4 +20,10 @@ run_worker_first = true
 
 [[r2_buckets]]
 binding = "VENDORED_MARKDOWN"
-bucket_name = "vendored-markdown"
+bucket_name = "vendored-markdown"
+
+[observability]
+enabled = true
+
+[observability.traces]
+enabled = true