Feat[BE]: refactor expense API and expense table match with new ERD

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

@@ -1,7 +1,7 @@
 CREATE TABLE expenses (
     id BIGSERIAL PRIMARY KEY,
     reference_number VARCHAR(50) UNIQUE NOT NULL,
-    supplier_id BIGINT NULL,
+    supplier_id BIGINT NOT NULL,
     category VARCHAR(50) NOT NULL CHECK (
         category IN ('BOP', 'NON-BOP')
     ),

internal/database/migrations/20251125055613_update_expneses_expense_nostock_and_expense_ralization.up.sql

@@ -0,0 +1,44 @@
+-- ============================
+-- EXPENSES
+-- ============================
+ALTER TABLE expenses DROP COLUMN IF EXISTS grand_total;
+
+ALTER TABLE expenses RENAME COLUMN note TO notes;
+
+ALTER TABLE expenses RENAME COLUMN expense_date TO transaction_date;
+
+-- ============================
+-- EXPENSE_REALIZATIONS
+-- ============================
+ALTER TABLE expense_realizations
+RENAME COLUMN realization_qty TO qty;
+
+ALTER TABLE expense_realizations
+RENAME COLUMN realization_unit_price TO price;
+
+ALTER TABLE expense_realizations RENAME COLUMN note TO notes;
+
+ALTER TABLE expense_realizations
+DROP COLUMN IF EXISTS realization_total_price;
+
+ALTER TABLE expense_realizations
+DROP COLUMN IF EXISTS realization_date;
+
+ALTER TABLE expense_realizations DROP COLUMN IF EXISTS created_by;
+
+ALTER TABLE expense_realizations
+ADD COLUMN IF NOT EXISTS created_at TIMESTAMPTZ DEFAULT NOW();
+
+-- ============================
+-- EXPENSE_NONSTOCKS
+-- ============================
+ALTER TABLE expense_nonstocks RENAME COLUMN note TO notes;
+
+ALTER TABLE expense_nonstocks DROP COLUMN IF EXISTS total_price;
+
+ALTER TABLE expense_nonstocks RENAME COLUMN unit_price TO price;
+
+ALTER TABLE expense_nonstocks DROP COLUMN IF EXISTS created_by;
+
+ALTER TABLE expense_nonstocks
+ADD COLUMN IF NOT EXISTS created_at TIMESTAMPTZ DEFAULT NOW();