Add migration for status column in files table

data/migrations/2026-01-06T00-53-48_add_status_column_to_files.sql

@@ -0,0 +1,6 @@
+-- Migration: add_status_column_to_files
+-- Created at: 2026-01-06T00:53:48.140Z
+
+-- Add status column to files table for tracking file processing status
+ALTER TABLE files ADD COLUMN status TEXT DEFAULT 'pending';
+