🎨 Palette: Fix backend CI failures

- Added `//go:build ignore` to standalone scripts in `scripts/` to prevent redeclaration of `main`.
- Fixed redundant newline in `fmt.Println` in `cmd/lighter_test/main.go`.
- Updated `trader/hyperliquid/trader_test.go` to match the actual error message phrasing.

Co-authored-by: tinkle-community <240652709+tinkle-community@users.noreply.github.com>

scripts/cleanup_duplicates.go

@@ -1,3 +1,5 @@
+//go:build ignore
+
 package main
 
 import (

scripts/clear_orders.go

@@ -1,3 +1,5 @@
+//go:build ignore
+
 package main
 
 import (

scripts/diagnose_orders.go

@@ -1,3 +1,5 @@
+//go:build ignore
+
 package main
 
 import (

scripts/fix_order_data.go

@@ -1,3 +1,5 @@
+//go:build ignore
+
 package main
 
 import (

scripts/migrate_encryption.go

@@ -1,3 +1,5 @@
+//go:build ignore
+
 package main
 
 import (