Fix pull-to-refresh behavior in infinite queries

- Reset infinite query data before fetching first page in internalFetch()
- Prevents pull-to-refresh from appending first page to existing data
- Ensures proper full data refresh when user pulls to refresh
- Maintains expected behavior for infinite query refetch operations

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: Hoang Pham

Sources/SwiftUIQuery/InfiniteQuery.swift

@@ -628,7 +628,11 @@ public final class InfiniteQuery<
     }
 
     /// Initial fetch for the first page
+    /// This resets the query data and fetches from the beginning
     public func internalFetch() async throws -> InfiniteData<TData, TPageParam> {
+        // Reset to initial state to clear all existing pages
+        setState(initialState)
+
         let initialParam = options.initialPageParam
         return try await fetchPage(param: initialParam, direction: .forward)
     }