[docs] Update interaction file upload docs for GetFiles() and upload limits

[aspire-repo-bot]

Documents changes from microsoft/aspire#19488

@JamesNK

Targeting release/17.0 — the latest release branch on microsoft/aspire.dev — because release/13.6 (from the source PR milestone 13.6) does not exist there.

Why

The source PR hardens interaction file uploads and changes the public API used to read uploaded files:

• Adds InteractionInput.GetFiles(), returning a new disposable InteractionFileCollection.
• Marks InteractionInput.Files [Obsolete] in favor of GetFiles().
• Disposing the collection deletes the uploaded temporary files from disk; after disposal, InteractionFile.OpenRead()/ReadAllBytesAsync() throw ObjectDisposedException, though already-open streams remain usable until disposed.
• Adds a shared maximum of 100 files for inputs with AllowMultipleFiles = true (1 file otherwise), enforced during upload with in-progress uploads counted as reserved slots.

The existing extensibility/interaction-service.mdx "Prompt for file upload" section used the old result.Data.Files?[0] pattern and didn't mention the new ownership/disposal model or the file-count limit, so it no longer matched the shipped API.

Changes

• src/frontend/src/content/docs/extensibility/interaction-service.mdx:
  • Updated the C# example to use using var files = result.Data.GetFiles(); instead of the obsolete Files property.
  • Added a paragraph explaining GetFiles() ownership/disposal semantics and that Files is obsolete.
  • Updated the AllowMultipleFiles bullet to document the 100-file limit (1 file when not multi-file) and that in-progress uploads count toward it.

Only this existing page was updated; no new pages were created.

Generated by PR Documentation Check for #19488 · auto · 63.7 AIC · ⌖ 12.7 AIC · ⊞ 19.6K · ◷

[aspire-repo-bot]

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[Copilot]

Pull request overview

Updates the Interaction Service documentation to reflect the new file-upload API patterns and lifecycle semantics introduced in microsoft/aspire (moving from InteractionInput.Files to GetFiles() and documenting temporary-file cleanup expectations).

Changes:

• Updated the C# file-upload example to use InteractionInput.GetFiles() and index into the returned collection.
• Added guidance about temporary file ownership/disposal for C# and release semantics for TypeScript (releaseFiles() in a finally block).

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