Fix context propagation for DisabledBatcher (#12231)

Finishes the implementation started in
#12225

Signed-off-by: Bogdan Drutu <bogdandrutu@gmail.com>

.chloggen/disabled-batcher-context.yaml

@@ -0,0 +1,25 @@
+# Use this changelog template to create an entry for release notes.
+
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: bug_fix
+
+# The name of the component, or a single word describing the area of concern, (e.g. otlpreceiver)
+component: exporterhelper
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Fix context propagation for DisabledBatcher
+
+# One or more tracking issues or pull requests related to the change
+issues: [12231]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext:
+
+# Optional: The change log or logs in which this entry should be included.
+# e.g. '[user]' or '[user, api]'
+# Include 'user' if the change is relevant to end users.
+# Include 'api' if there is a change to a library API.
+# Default: '[user]'
+change_logs: [user]

exporter/internal/queue/disabled_batcher.go

@@ -30,11 +30,11 @@ func (qb *DisabledBatcher) Start(_ context.Context, _ component.Host) error {
 	go func() {
 		defer qb.stopWG.Done()
 		for {
-			_, req, done, ok := qb.queue.Read(context.Background())
+			ctx, req, done, ok := qb.queue.Read(context.Background())
 			if !ok {
 				return
 			}
-			qb.flush(context.Background(), req, []exporterqueue.DoneCallback{done})
+			qb.flush(ctx, req, []exporterqueue.DoneCallback{done})
 		}
 	}()
 	return nil