add callouts (#4657) (#4685)

(cherry picked from commit e1a11d3)

Co-authored-by: Brandon Morelli <[email protected]>

docs/en/observability/apm/manage-storage/data-streams.asciidoc

@@ -74,7 +74,12 @@ Special characters include:
 '\\', '/', '*', '?', '"', '<', '>', '|', ' ', ',', '#', ':', '-'
 ----
 ====
-
++
+[IMPORTANT]
+====
+Additional storage efficiencies provided by {ref}/mapping-source-field.html[Synthetic `_source`]
+are available to users with an {subscriptions}[appropriate license].
+====
 
 Logs::
 Logs include application error events and application logs.

docs/en/observability/profiling-manage-storage.asciidoc

@@ -2,10 +2,13 @@
 = Manage data storage
 
 
-Universal Profiling provides the following ways to manage how your data is stored. 
+Universal Profiling provides the following ways to manage how your data is stored.
 
-* <<profiling-index-lifecycle-management, Index lifecycle management>> automatically manages your indices according to age or size metric thresholds. Universal Profiling ships with a default index lifecycle policy, but you can create a custom policy to meet your requirements. 
+* <<profiling-index-lifecycle-management, Index lifecycle management>> automatically manages your indices according to age or size metric thresholds. Universal Profiling ships with a default index lifecycle policy, but you can create a custom policy to meet your requirements.
 * <<profiling-probabilistic-profiling, Probabilistic profiling>> mode uses representative samples of profiling data to reduce storage needs even further.
 
-
-
+[IMPORTANT]
+====
+Additional storage efficiencies provided by {ref}/mapping-source-field.html[Synthetic `_source`]
+are available to users with an {subscriptions}[appropriate license].
+====