refactor(webhook): add persistent keys in logs (#5030)

## Summary

Update `publishOnEventBridge` to use the existing `readEvent` helper
instead of directly reading the `x-github-event` header and calling
`checkEventIsSupported`.

Only `eventType` is destructured from `readEvent`, since the parsed
event object isn’t needed.

## Why

This makes the EventBridge path consistent with `publishForRunners`,
ensuring persistent logging fields (repository, action, workflow job
name, status, etc.) are added to the logger in both code paths.

## Impact

* No functional changes
* Consistent logging behavior
* Removes duplicate event parsing logic

Author: edersonbrilhante

lambdas/functions/webhook/src/webhook/index.ts

@@ -21,7 +21,7 @@ export async function publishForRunners(
 
   const checkBodySizeResult = checkBodySize(body, headers);
 
-  const { event, eventType } = readEvent(headers, body);
+  const { event, eventType } = readEvent(headers, body, ['workflow_job']);
   logger.info(`Github event ${event.action} accepted for ${event.repository.full_name}`);
   if (checkBodySizeResult.sizeExceeded) {
     // We only warn for large event, when moving the event bridge we can only can accept events up to 256KB
@@ -39,11 +39,10 @@ export async function publishOnEventBridge(
 
   await verifySignature(headers, body, config.webhookSecret);
 
-  const eventType = headers['x-github-event'] as string;
-  checkEventIsSupported(eventType, config.allowedEvents);
-
   const checkBodySizeResult = checkBodySize(body, headers);
 
+  const { eventType } = readEvent(headers, body, config.allowedEvents);
+
   logger.info(
     `Github event ${headers['x-github-event'] as string} accepted for ` +
       `${headers['x-github-hook-installation-target-id'] as string}`,
@@ -127,9 +126,13 @@ function checkEventIsSupported(eventType: string, allowedEvents: string[]): void
   }
 }
 
-function readEvent(headers: IncomingHttpHeaders, body: string): { event: WorkflowJobEvent; eventType: string } {
+function readEvent(
+  headers: IncomingHttpHeaders,
+  body: string,
+  allowedEvents: string[],
+): { event: WorkflowJobEvent; eventType: string } {
   const eventType = headers['x-github-event'] as string;
-  checkEventIsSupported(eventType, ['workflow_job']);
+  checkEventIsSupported(eventType, allowedEvents);
 
   const event = JSON.parse(body) as WorkflowJobEvent;
   logger.appendPersistentKeys({