[obs] More fixes and versioning

Author: karenzone

solutions/observability/data-set-quality-monitoring.md

@@ -2,15 +2,14 @@
 mapped_urls:
   - https://www.elastic.co/guide/en/observability/current/monitor-datasets.html
   - https://www.elastic.co/guide/en/serverless/current/observability-monitor-datasets.html
-
+applies_to:
+  stack: beta
+  serverless: beta
 navigation_title: "Data set quality"
 ---
 
 # Data set quality monitoring [observability-monitor-datasets]
 
-
-[beta]
-
 The **Data Set Quality** page provides an overview of your log, metric, trace, and synthetic data sets. Use this information to get an idea of your overall data set quality and find data sets that contain incorrectly parsed documents.
 
 To open **Data Set Quality**, find **Stack Management** in the main menu or use the [global search field](/explore-analyze/find-and-organize/find-apps-and-objects.md). By default, the page only shows log data sets. To see other data set types, select them from the **Type** menu.

solutions/observability/get-started/create-an-observability-project.md

@@ -2,6 +2,8 @@
 navigation_title: "Create an Observability project"
 mapped_pages:
   - https://www.elastic.co/guide/en/serverless/current/observability-create-an-observability-project.html
+applies_to:
+  serverless:
 ---
 
 % Serverless only

solutions/observability/get-started/quickstart-monitor-hosts-with-elastic-agent.md

@@ -2,6 +2,9 @@
 mapped_urls:
   - https://www.elastic.co/guide/en/observability/current/quickstart-monitor-hosts-with-elastic-agent.html
   - https://www.elastic.co/guide/en/serverless/current/observability-quickstarts-monitor-hosts-with-elastic-agent.html
+applies_to:
+  stack:
+  serverless:
 ---
 
 # Quickstart: Monitor hosts with {{agent}} [quickstart-monitor-hosts-with-elastic-agent]

solutions/observability/get-started/quickstart-monitor-hosts-with-opentelemetry.md

@@ -2,6 +2,9 @@
 mapped_urls:
   - https://www.elastic.co/guide/en/observability/current/quickstart-monitor-hosts-with-otel.html
   - https://www.elastic.co/guide/en/serverless/current/quickstart-monitor-hosts-with-otel.html
+applies_to:
+  stack:
+  serverless:
 ---
 
 # Quickstart: Monitor hosts with OpenTelemetry [quickstart-monitor-hosts-with-otel]

solutions/observability/get-started/quickstart-monitor-kubernetes-cluster-with-elastic-agent.md

@@ -2,6 +2,9 @@
 mapped_urls:
   - https://www.elastic.co/guide/en/serverless/current/observability-quickstarts-k8s-logs-metrics.html
   - https://www.elastic.co/guide/en/observability/current/monitor-k8s-logs-metrics-with-elastic-agent.html
+applies_to:
+  stack:
+  serverless:
 ---
 
 # Quickstart: Monitor your Kubernetes cluster with {{agent}} [monitor-k8s-logs-metrics-with-elastic-agent]

solutions/observability/get-started/quickstart-unified-kubernetes-observability-with-elastic-distributions-of-opentelemetry-edot.md

@@ -2,6 +2,9 @@
 mapped_urls:
   - https://www.elastic.co/guide/en/observability/current/monitor-k8s-otel-edot.html
   - https://www.elastic.co/guide/en/serverless/current/monitor-k8s-otel-edot.html
+applies_to:
+  stack:
+  serverless:
 ---
 
 # Quickstart: Unified Kubernetes Observability with Elastic Distributions of OpenTelemetry (EDOT) [monitor-k8s-otel-edot]

solutions/observability/get-started/what-is-elastic-observability.md

@@ -77,21 +77,21 @@ On the {{observability}} **Overview** page, the **{{user-experience}}** chart pr
 
 You can then drill down into the {{user-experience}} dashboard by clicking **Show dashboard** too see data by URL, operating system, browser, and location.
 
- [Learn more about {{user-experience}} →](../../../solutions/observability/apps/real-user-monitoring-user-experience.md).
+ [Learn more about {{user-experience}} →](../../../solutions/observability/apps/real-user-monitoring-user-experience.md)
 
 ## Synthetic monitoring [synthetic-monitoring-overview]
 
 Simulate actions and requests that an end user would perform on your site at predefined intervals and in a controlled environment. The end result is rich, consistent, and repeatable data that you can trend and alert on.
 
-[Learn more about Synthetic monitoring →](../../../solutions/observability/apps/synthetic-monitoring.md).
+[Learn more about Synthetic monitoring →](../../../solutions/observability/apps/synthetic-monitoring.md)
 
 % Stateful only for Universal Profiling.
 
 ## Universal Profiling [universal-profiling-overview]
 
 Build stack traces to get visibility into your system without application source code changes or instrumentation. Use flamegraphs to explore system performance and identify the most expensive lines of code, increase CPU resource efficiency, debug performance regressions, and reduce cloud spend.
 
-[Learn more about Universal Profiling →](../../../solutions/observability/infra-and-hosts/universal-profiling.md).
+[Learn more about Universal Profiling →](../../../solutions/observability/infra-and-hosts/universal-profiling.md)
 
 
 ## Alerting [observability-serverless-observability-overview-alerting]