update letter outgoing final attachment

migrations/000046_letter_outgoing_final_attachaments.up.sql

@@ -0,0 +1,12 @@
+ALTER TABLE letter_outgoing_attachments
+    DROP COLUMN IF EXISTS is_final;
+
+CREATE TABLE IF NOT EXISTS letter_outgoing_final_attachments (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    letter_id UUID NOT NULL REFERENCES letters_outgoing(id) ON DELETE CASCADE,
+    file_url TEXT NOT NULL,
+    file_name TEXT NOT NULL,
+    file_type TEXT NOT NULL,
+    uploaded_by UUID REFERENCES users(id) ON DELETE SET NULL,
+    uploaded_at TIMESTAMP WITHOUT TIME ZONE DEFAULT CURRENT_TIMESTAMP
+);