fix(plugin-search): add locale to key in syncedDocsSet (#14289)

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Fixes #

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### What?
This PR adjusts the `docKey` used in `syncDocAsSearchIndex` to consider
configured locales. The existing behavior prevents reindexing from
saving locales outside of the default locale. With this PR, the plugin
successfully reindexes all configured locales.

### Why?
To allow all configured locales to be reindexed as expected.

### How?
- Checking if the pluginConfig includes locales and, if so, sets the
`docKey` to include the `syncLocale` being used
- Correcting type for `pluginConfig` in `SyncWithSearchArgs` to be
`SanitizedSearchPluginConfig`
- Adding an int test to demonstrate reindexing all configured locales as
default behavior

Fixes #14276

Before:


[before.mp4](https://private-user-images.githubusercontent.com/20878653/503591671-d7d9ccbf-7e9d-4d98-bbc4-0e5729bb2505.mp4?jwt=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.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.93C6OWecb34l8JeAtAc2AdOFh6aVoIDfcSxJ247FO1k)

After:


[Search-Results---Payload--after.webm](https://github.com/user-attachments/assets/57bb689d-4cfb-40f0-be8d-08c6787c7bec)

Author: akhrarovsaid

packages/plugin-search/src/types.ts

@@ -84,7 +84,7 @@ export type SanitizedSearchPluginConfig = {
 
 export type SyncWithSearchArgs = {
   collection: string
-  pluginConfig: SearchPluginConfig
+  pluginConfig: SanitizedSearchPluginConfig
 } & Omit<Parameters<CollectionAfterChangeHook>[0], 'collection'>
 
 export type SyncDocArgs = {

packages/plugin-search/src/utilities/syncDocAsSearchIndex.ts

@@ -24,7 +24,8 @@ export const syncDocAsSearchIndex = async ({
     },
     title,
   }
-  const docKey = `${collection}:${id}`
+  const docKeyPrefix = `${collection}:${id}`
+  const docKey = pluginConfig.locales?.length ? `${docKeyPrefix}:${syncLocale}` : docKeyPrefix
   const syncedDocsSet = (req.context?.syncedDocsSet as Set<string>) || new Set<string>()
 
   if (syncedDocsSet.has(docKey)) {

test/plugin-search/int.spec.ts

@@ -589,6 +589,88 @@ describe('@payloadcms/plugin-search', () => {
     )
   })
 
+  it('should reindex all configured locales', async () => {
+    const post = await payload.create({
+      collection: postsSlug,
+      locale: 'en',
+      data: {
+        title: 'Test page published',
+        _status: 'published',
+        slug: 'test-en',
+      },
+    })
+    await payload.update({
+      collection: postsSlug,
+      id: post.id,
+      locale: 'es',
+      data: {
+        _status: 'published',
+        slug: 'test-es',
+      },
+    })
+    await payload.update({
+      collection: postsSlug,
+      id: post.id,
+      locale: 'de',
+      data: {
+        _status: 'published',
+        slug: 'test-de',
+      },
+    })
+
+    const {
+      docs: [postBeforeReindex],
+    } = await payload.find({
+      collection: 'search',
+      locale: 'all',
+      where: {
+        doc: {
+          equals: {
+            value: post.id,
+            relationTo: postsSlug,
+          },
+        },
+      },
+      pagination: false,
+      limit: 1,
+      depth: 0,
+    })
+
+    expect(postBeforeReindex?.slug).not.toBeFalsy()
+
+    const endpointRes = await restClient.POST(`/search/reindex`, {
+      body: JSON.stringify({
+        collections: [postsSlug],
+      }),
+      headers: {
+        Authorization: `JWT ${token}`,
+      },
+    })
+
+    expect(endpointRes.status).toBe(200)
+
+    const {
+      docs: [postAfterReindex],
+    } = await payload.find({
+      collection: 'search',
+      locale: 'all',
+      where: {
+        doc: {
+          equals: {
+            value: post.id,
+            relationTo: postsSlug,
+          },
+        },
+      },
+      pagination: false,
+      limit: 1,
+      depth: 0,
+    })
+
+    expect(postAfterReindex?.slug).not.toBeFalsy()
+    expect(postAfterReindex?.slug).toStrictEqual(postBeforeReindex?.slug)
+  })
+
   it('should sync trashed documents correctly with search plugin', async () => {
     // Create a published post
     const publishedPost = await payload.create({