fix(post-process): Add missing post-process-forwarder (#309)

We were not running the post-process forwarder, causing post-process to not run which covers all plugin and rule/alert work.

Fixes #287.

docker-compose.yml

@@ -142,6 +142,10 @@ services:
   worker:
     << : *sentry_defaults
     command: run worker
+  post-process-forwarder:
+    << : *sentry_defaults
+    # Increase `--commit-batch-size 1` below to deal with high-load environments.
+    command: run post-process-forwarder --commit-batch-size 1
   sentry-cleanup:
     << : *sentry_defaults
     image: sentry-cleanup-onpremise-local