(BE-58,,59): extend db schema & build stock transfer api

- Extend DB schema for stock transfers
- Build stock transfer API (create,)

internal/database/migrations/20251014024656_create_stock_transfer_deliveries.up.sql

@@ -0,0 +1,43 @@
+-- ===============================================================
+--  STOCK TRANSFER DELIVERIES (EKSPEDISI)
+-- ===============================================================
+
+CREATE TABLE IF NOT EXISTS stock_transfer_deliveries (
+    id BIGSERIAL PRIMARY KEY,
+    stock_transfer_id BIGINT NOT NULL,
+    supplier_id BIGINT,
+    vehicle_plate VARCHAR(20),
+    driver_name VARCHAR(100),
+    document_number VARCHAR(50),
+    document_path TEXT,
+    shipping_cost_item NUMERIC(15,3),
+    shipping_cost_total NUMERIC(15,3),
+    note TEXT,
+    created_at TIMESTAMPTZ DEFAULT NOW(),
+    updated_at TIMESTAMPTZ DEFAULT NOW(),
+    deleted_at TIMESTAMPTZ
+);
+
+-- FOREIGN KEYS
+DO $$
+BEGIN
+    IF EXISTS (SELECT 1 FROM pg_tables WHERE tablename = 'stock_transfers') THEN
+        ALTER TABLE stock_transfer_deliveries
+            ADD CONSTRAINT fk_stock_transfer_deliveries_transfer
+            FOREIGN KEY (stock_transfer_id)
+            REFERENCES stock_transfers(id)
+            ON DELETE CASCADE ON UPDATE CASCADE;
+    END IF;
+
+    IF EXISTS (SELECT 1 FROM pg_tables WHERE tablename = 'suppliers') THEN
+        ALTER TABLE stock_transfer_deliveries
+            ADD CONSTRAINT fk_stock_transfer_deliveries_supplier
+            FOREIGN KEY (supplier_id)
+            REFERENCES suppliers(id)
+            ON DELETE SET NULL ON UPDATE CASCADE;
+    END IF;
+END $$;
+
+-- INDEXES
+CREATE INDEX IF NOT EXISTS idx_stock_transfer_deliveries_transfer_id ON stock_transfer_deliveries(stock_transfer_id);
+CREATE INDEX IF NOT EXISTS idx_stock_transfer_deliveries_supplier_id ON stock_transfer_deliveries(supplier_id);