Feat(BE-127): create migration for transfer to laying and inisiate module

internal/database/migrations/20251029081833_create_laying_kandang_transfers_table.up.sql

@@ -0,0 +1,40 @@
+CREATE TABLE IF NOT EXISTS laying_kandang_transfers (
+    id BIGSERIAL PRIMARY KEY,
+    kandang_id BIGINT,
+    product_warehouse_id BIGINT,
+    qty NUMERIC(15,3),
+    laying_transfer_id BIGINT NOT NULL
+);
+
+-- FOREIGN KEYS (dijalankan setelah semua tabel parent ada)
+DO $$
+BEGIN
+    IF EXISTS (SELECT 1 FROM pg_tables WHERE tablename = 'kandangs') THEN
+        ALTER TABLE laying_kandang_transfers
+            ADD CONSTRAINT fk_laying_kandang_transfers_kandang
+            FOREIGN KEY (kandang_id)
+            REFERENCES kandangs(id)
+            ON DELETE RESTRICT ON UPDATE CASCADE;
+    END IF;
+
+    IF EXISTS (SELECT 1 FROM pg_tables WHERE tablename = 'product_warehouses') THEN
+        ALTER TABLE laying_kandang_transfers
+            ADD CONSTRAINT fk_laying_kandang_transfers_product_warehouse
+            FOREIGN KEY (product_warehouse_id)
+            REFERENCES product_warehouses(id)
+            ON DELETE RESTRICT ON UPDATE CASCADE;
+    END IF;
+
+    IF EXISTS (SELECT 1 FROM pg_tables WHERE tablename = 'laying_transfers') THEN
+        ALTER TABLE laying_kandang_transfers
+            ADD CONSTRAINT fk_laying_kandang_transfers_laying_transfer
+            FOREIGN KEY (laying_transfer_id)
+            REFERENCES laying_transfers(id)
+            ON DELETE RESTRICT ON UPDATE CASCADE;
+    END IF;
+END $$;
+
+-- INDEXES
+CREATE INDEX IF NOT EXISTS idx_laying_kandang_transfers_kandang_id ON laying_kandang_transfers(kandang_id);
+CREATE INDEX IF NOT EXISTS idx_laying_kandang_transfers_product_warehouse_id ON laying_kandang_transfers(product_warehouse_id);
+CREATE INDEX IF NOT EXISTS idx_laying_kandang_transfers_laying_transfer_id ON laying_kandang_transfers(laying_transfer_id);