[workers-observability] Add changelog entry for CPU time and Wall time in Workers Observability offerings (#21449)

* [workers-observability] Add changelog entry for CPU time and Wall time in Workers Observability offerings

* hide the changelog, deep link query builder

---------

Co-authored-by: Rohin Lohe <[email protected]>

Author: rohinlohe

src/assets/images/changelog/workers/observability/2025-04-09-query-builder.png

@@ -6,7 +6,7 @@ products:
 date: 2025-04-07T00:00:00Z
 ---
 
-You can now capture a maximum of 256 KB of log events per Workers invocation, helping you gain better visiblity into application behavior.
+You can now capture a maximum of 256 KB of log events per Workers invocation, helping you gain better visibility into application behavior.
 
 All console.log() statements, exceptions, request metadata, and headers are automatically captured during the Worker invocation and emitted
 as [JSON object](/logs/reference/log-fields/account/workers_trace_events). [Workers Logs](/workers/observability/logs/workers-logs) deserializes 

src/assets/images/changelog/workers/observability/2025-04-09-wall-time-filter.png

@@ -0,0 +1,22 @@
+---
+title: CPU time and Wall time now published for Workers Invocations
+description: Workers Observability tooling now shows CPU time and Wall time for a Workers Invocation.
+products:
+  - workers
+date: 2025-04-09T00:00:00Z
+hidden: true
+---
+
+You can now observe and investigate the CPU time and Wall time for every Workers Invocations.
+
+- For [Workers Logs](/workers/observability/logs/workers-logs), CPU time and Wall time are surfaced in the [Invocation Log](/workers/observability/logs/workers-logs/#invocation-logs)..
+- For [Tail Workers](/workers/observability/logs/tail-workers), CPU time and Wall time are surfaced at the top level of the [Workers Trace Events object](/logs/reference/log-fields/account/workers_trace_events).
+- For [Workers Logpush](/workers/observability/logs/logpush), CPU and Wall time are surfaced at the top level of the [Workers Trace Events object](/logs/reference/log-fields/account/workers_trace_events). All new jobs will have these new fields included by default. Existing jobs need to be updated to include CPU time and Wall time.
+
+You can use a Workers Logs filter to search for logs where Wall time exceeds 100ms.
+
+![Workers Logs Wall Time Filter](src/assets/images/changelog/workers/observability/2025-04-09-wall-time-filter.png)
+
+You can also use the Workers Observability [Query Builder](https://dash.cloudflare.com/?to=/:account/workers-and-pages/observability/investigate) to find the median CPU time and median Wall time for all of your Workers.
+
+![Query Builder filter](src/assets/images/changelog/workers/observability/2025-04-09-query-builder.png)