Problem

When using AI Assistant to review pull requests, it currently reviews all changed files including auto-generated files like:

• pnpm-lock.yaml / package-lock.json / yarn.lock
• EF Core migration snapshots (**/ApplicationContextModelSnapshot.cs)
• EF Core migration Designer files (**/*Designer.cs)
• Other generated code

This wastes AI tokens and produces unhelpful review comments on files that shouldn't be manually reviewed.

Proposed Solution

Add a configuration option (similar to "Code Analysis Setting" → "Analysis Files") that allows specifying file patterns to exclude from AI Assistant review.

Example patterns:

-**/pnpm-lock.yaml
-**/package-lock.json
-**/*Designer.cs
-**/Migrations/*.cs
-**/*.generated.cs

Expected Behavior

Files matching exclusion patterns should be skipped (not sent to the model provider at all) when AI Assistant reviews commits or pull requests.