Add migration script to introduce relay_node column in packet_seen table

add_relay_node_column.py

@@ -0,0 +1,20 @@
+"""
+Migration script to add relay_node column to packet_seen table.
+Run this once to update your database schema.
+"""
+import asyncio
+from meshview import database
+
+async def add_relay_node_column():
+    """Add relay_node column to packet_seen table"""
+    async with database.async_session() as session:
+        # Add the column
+        await session.execute("""
+            ALTER TABLE packet_seen 
+            ADD COLUMN IF NOT EXISTS relay_node BIGINT
+        """)
+        await session.commit()
+        print("Successfully added relay_node column to packet_seen table")
+
+if __name__ == "__main__":
+    asyncio.run(add_relay_node_column())