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

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

internal/database/migrations/20251014024355_create_stock_transfers.down.sql

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+-- DROP TABLE: STOCK_TRANSFERS DAN SEQUENCE-NYA
+DROP TABLE IF EXISTS stock_transfers CASCADE;
+
+DROP SEQUENCE IF EXISTS stock_transfer_seq CASCADE;

internal/database/migrations/20251014024355_create_stock_transfers.up.sql

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+-- ===============================================================
+--  STOCK TRANSFERS (HEADER)
+-- ===============================================================
+
+CREATE SEQUENCE IF NOT EXISTS stock_transfer_seq START 1;
+
+CREATE TABLE IF NOT EXISTS stock_transfers (
+    id BIGSERIAL PRIMARY KEY,
+    movement_number VARCHAR(50) UNIQUE NOT NULL,
+    from_warehouse_id BIGINT NOT NULL,
+    to_warehouse_id BIGINT NOT NULL,
+    area_id BIGINT,
+    reason TEXT,
+    transfer_date DATE NOT NULL,
+    created_by BIGINT,
+    created_at TIMESTAMPTZ DEFAULT NOW(),
+    updated_at TIMESTAMPTZ DEFAULT NOW(),
+    deleted_at TIMESTAMPTZ
+);
+
+-- FOREIGN KEYS (dijalankan setelah semua tabel parent ada)
+DO $$
+BEGIN
+    IF EXISTS (SELECT 1 FROM pg_tables WHERE tablename = 'warehouses') THEN
+        ALTER TABLE stock_transfers
+            ADD CONSTRAINT fk_stock_transfers_from_warehouse
+            FOREIGN KEY (from_warehouse_id)
+            REFERENCES warehouses(id)
+            ON DELETE RESTRICT ON UPDATE CASCADE;
+        ALTER TABLE stock_transfers
+            ADD CONSTRAINT fk_stock_transfers_to_warehouse
+            FOREIGN KEY (to_warehouse_id)
+            REFERENCES warehouses(id)
+            ON DELETE RESTRICT ON UPDATE CASCADE;
+    END IF;
+
+    IF EXISTS (SELECT 1 FROM pg_tables WHERE tablename = 'areas') THEN
+        ALTER TABLE stock_transfers
+            ADD CONSTRAINT fk_stock_transfers_area
+            FOREIGN KEY (area_id)
+            REFERENCES areas(id)
+            ON DELETE SET NULL ON UPDATE CASCADE;
+    END IF;
+
+    IF EXISTS (SELECT 1 FROM pg_tables WHERE tablename = 'users') THEN
+        ALTER TABLE stock_transfers
+            ADD CONSTRAINT fk_stock_transfers_created_by
+            FOREIGN KEY (created_by)
+            REFERENCES users(id)
+            ON DELETE SET NULL ON UPDATE CASCADE;
+    END IF;
+END $$;
+
+-- INDEXES
+CREATE INDEX IF NOT EXISTS idx_stock_transfers_from_warehouse_id ON stock_transfers(from_warehouse_id);
+CREATE INDEX IF NOT EXISTS idx_stock_transfers_to_warehouse_id   ON stock_transfers(to_warehouse_id);
+CREATE INDEX IF NOT EXISTS idx_stock_transfers_transfer_date     ON stock_transfers(transfer_date);

internal/database/migrations/20251014024642_create_stock_transfer_details.down.sql

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+-- DROP TABLE: STOCK_TRANSFER_DETAILS
+DROP TABLE IF EXISTS stock_transfer_details CASCADE;

internal/database/migrations/20251014024642_create_stock_transfer_details.up.sql

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+-- ===============================================================
+--  STOCK TRANSFER DETAILS (PRODUK)
+-- ===============================================================
+
+CREATE TABLE IF NOT EXISTS stock_transfer_details (
+    id BIGSERIAL PRIMARY KEY,
+    stock_transfer_id BIGINT NOT NULL,
+    product_id BIGINT NOT NULL,
+    quantity NUMERIC(15, 3) NOT NULL CHECK (quantity > 0),
+    before_quantity NUMERIC(15, 3),
+    after_quantity NUMERIC(15, 3),
+    note TEXT,
+    created_at TIMESTAMPTZ DEFAULT NOW(),
+    updated_at TIMESTAMPTZ DEFAULT NOW(),
+    deleted_at TIMESTAMPTZ
+);
+
+-- ===============================================================
+--  FOREIGN KEYS (dengan pengecekan tabel agar anti gagal)
+-- ===============================================================
+
+DO $$
+BEGIN
+    IF EXISTS (SELECT 1 FROM pg_tables WHERE tablename = 'stock_transfers') THEN
+        EXECUTE
+        'ALTER TABLE stock_transfer_details
+         ADD CONSTRAINT fk_stock_transfer_details_transfer
+         FOREIGN KEY (stock_transfer_id)
+         REFERENCES stock_transfers(id)
+         ON DELETE CASCADE ON UPDATE CASCADE';
+    END IF;
+
+    IF EXISTS (SELECT 1 FROM pg_tables WHERE tablename = 'products') THEN
+        EXECUTE
+        'ALTER TABLE stock_transfer_details
+         ADD CONSTRAINT fk_stock_transfer_details_product
+         FOREIGN KEY (product_id)
+         REFERENCES products(id)
+         ON DELETE RESTRICT ON UPDATE CASCADE';
+    END IF;
+END $$;
+
+-- ===============================================================
+--  INDEXES
+-- ===============================================================
+
+CREATE INDEX IF NOT EXISTS idx_stock_transfer_details_transfer_id ON stock_transfer_details (stock_transfer_id);
+
+CREATE INDEX IF NOT EXISTS idx_stock_transfer_details_product_id ON stock_transfer_details (product_id);

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

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+-- DROP TABLE: STOCK_TRANSFER_DELIVERIES
+DROP TABLE IF EXISTS stock_transfer_deliveries CASCADE;

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

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+-- ===============================================================
+--  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);

internal/database/migrations/20251014024702_create_stock_transfer_delivery_items.down.sql

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+-- DROP PIVOT TABLE: STOCK_TRANSFER_DELIVERY_ITEMS
+DROP TABLE IF EXISTS stock_transfer_delivery_items CASCADE;

internal/database/migrations/20251014024702_create_stock_transfer_delivery_items.up.sql

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+-- ===============================================================
+--  STOCK TRANSFER DELIVERY ITEMS (PIVOT)
+-- ===============================================================
+
+CREATE TABLE IF NOT EXISTS stock_transfer_delivery_items (
+    id BIGSERIAL PRIMARY KEY,
+    stock_transfer_delivery_id BIGINT NOT NULL,
+    stock_transfer_detail_id BIGINT NOT NULL,
+    quantity NUMERIC(15, 3) NOT NULL CHECK (quantity > 0)
+);
+
+-- FOREIGN KEYS
+DO $$
+BEGIN
+    IF EXISTS (SELECT 1 FROM pg_tables WHERE tablename = 'stock_transfer_deliveries') THEN
+        ALTER TABLE stock_transfer_delivery_items
+            ADD CONSTRAINT fk_delivery_items_delivery
+            FOREIGN KEY (stock_transfer_delivery_id)
+            REFERENCES stock_transfer_deliveries(id)
+            ON DELETE CASCADE ON UPDATE CASCADE;
+    END IF;
+
+    IF EXISTS (SELECT 1 FROM pg_tables WHERE tablename = 'stock_transfer_details') THEN
+        ALTER TABLE stock_transfer_delivery_items
+            ADD CONSTRAINT fk_delivery_items_detail
+            FOREIGN KEY (stock_transfer_detail_id)
+            REFERENCES stock_transfer_details(id)
+            ON DELETE CASCADE ON UPDATE CASCADE;
+    END IF;
+END $$;
+
+-- INDEXES
+CREATE INDEX IF NOT EXISTS idx_stock_transfer_delivery_items_delivery_id ON stock_transfer_delivery_items (stock_transfer_delivery_id);
+
+CREATE INDEX IF NOT EXISTS idx_stock_transfer_delivery_items_detail_id ON stock_transfer_delivery_items (stock_transfer_detail_id);