Feat[BE-261,265]: createing BOP and BOP realization(Unfinished)

internal/database/migrations/20251117034511_create_expenses_table.up.sql

@@ -1,11 +1,11 @@
 CREATE TABLE expenses (
     id BIGSERIAL PRIMARY KEY,
-    reference_number VARCHAR, -- format => BOP-LTI-0001 = 0001 is increment
+    reference_number VARCHAR(50) UNIQUE NOT NULL,
     supplier_id BIGINT NULL,
     category VARCHAR(50) NOT NULL CHECK (
         category IN ('BOP', 'NON-BOP')
     ),
-    po_number VARCHAR(50) UNIQUE NOT NULL,
+    po_number VARCHAR(50) NULL,
     document_path JSON,
     expense_date DATE NOT NULL,
     grand_total NUMERIC(15, 3) DEFAULT 0,
@@ -16,6 +16,8 @@ CREATE TABLE expenses (
     deleted_at TIMESTAMPTZ
 );
 
+CREATE SEQUENCE expenses_ref_seq INCREMENT BY 1 START WITH 1;
+
 -- Tambahkan Foreign Key ke suppliers
 DO $$
 BEGIN
@@ -23,7 +25,9 @@ BEGIN
         ALTER TABLE expenses
             ADD CONSTRAINT fk_expenses_supplier_id 
             FOREIGN KEY (supplier_id) REFERENCES suppliers(id);
-    END IF;
+
+END IF;
+
 END $$;
 
 -- Tambahkan Foreign Key ke users (created_by)