allow getSafeFileId to accept UppyFile (#6048)

fixes #6033
also convert InternalMetadata to interface (interface is preferred when
possible)

<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> Broaden `getSafeFileId` to accept `UppyFile` and extend types by
converting `InternalMetadata` to an interface with optional
`relativePath`.
> 
> - **utils**:
> - **`getSafeFileId`**: Broadens parameter via new `SafeFileIdBasis` so
it can accept `UppyFile`; call site logic unchanged.
> - **Types**: Convert `InternalMetadata` to an interface and add
optional `relativePath`; propagate through `UppyFile`/`generateFileID`
typings.
> - **Changeset**: Adds patch entry for `@uppy/utils`.
> 
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
133240fc0f. This will update automatically
on new commits. Configure
[here](https://cursor.com/dashboard?tab=bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

---------

Co-authored-by: Merlijn Vos <merlijn@soverin.net>

.changeset/tender-yaks-shave.md

@@ -0,0 +1,5 @@
+---
+"@uppy/utils": patch
+---
+
+Allow `getSafeFileId` to accept `UppyFile`

packages/@uppy/utils/src/UppyFile.ts

@@ -4,7 +4,11 @@ export type Meta = Record<string, unknown>
 
 export type Body = Record<string, unknown>
 
-export type InternalMetadata = { name: string; type?: string }
+export interface InternalMetadata {
+  name: string
+  type?: string
+  relativePath?: string
+}
 
 // for better readability instead of using Record<string, something>
 export type UppyFileId = string

packages/@uppy/utils/src/generateFileID.ts

@@ -77,13 +77,16 @@ function hasFileStableId<M extends Meta, B extends Body>(
   return stableIdProviders.has(file.remote.provider!)
 }
 
+export type SafeFileIdBasis<M extends Meta, B extends Body> = Partial<
+  Pick<UppyFile<M, B>, 'id' | 'type'>
+> &
+  (
+    | Pick<RemoteUppyFile<M, B>, 'isRemote' | 'remote' | 'data'>
+    | Pick<LocalUppyFile<M, B>, 'isRemote' | 'data'>
+  ) & { meta?: { relativePath?: unknown } | undefined }
+
 export function getSafeFileId<M extends Meta, B extends Body>(
-  file: Partial<Pick<UppyFile<M, B>, 'id' | 'type'>> &
-    Pick<UppyFile<M, B>, 'data'> &
-    (
-      | Pick<RemoteUppyFile<M, B>, 'isRemote' | 'remote'>
-      | Pick<LocalUppyFile<M, B>, 'isRemote'>
-    ) & { meta?: { relativePath?: unknown } | undefined },
+  file: SafeFileIdBasis<M, B>,
   instanceId: string,
 ): string {
   if (hasFileStableId(file)) return file.id!