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

internal/database/migrations/20251029074825_create_laying_transfers_table.up.sql

@@ -0,0 +1,42 @@
+CREATE TABLE IF NOT EXISTS laying_transfers (
+    id BIGSERIAL PRIMARY KEY,
+    from_project_flock_id BIGINT NOT NULL,
+    to_project_flock_id BIGINT NOT NULL,
+    total_quantity INTEGER,
+    notes TEXT,
+    created_at TIMESTAMPTZ DEFAULT now(),
+    updated_at TIMESTAMPTZ DEFAULT now(),
+    deleted_at TIMESTAMPTZ,
+    created_by BIGINT
+);
+
+-- FOREIGN KEYS (dijalankan setelah semua tabel parent ada)
+DO $$
+BEGIN
+    IF EXISTS (SELECT 1 FROM pg_tables WHERE tablename = 'project_flocks') THEN
+        ALTER TABLE laying_transfers
+            ADD CONSTRAINT fk_laying_from_project_flock
+            FOREIGN KEY (from_project_flock_id)
+            REFERENCES project_flocks(id)
+            ON DELETE RESTRICT ON UPDATE CASCADE;
+        ALTER TABLE laying_transfers
+            ADD CONSTRAINT fk_laying_to_project_flock
+            FOREIGN KEY (to_project_flock_id)
+            REFERENCES project_flocks(id)
+            ON DELETE RESTRICT ON UPDATE CASCADE;
+    END IF;
+
+    IF EXISTS (SELECT 1 FROM pg_tables WHERE tablename = 'users') THEN
+        ALTER TABLE laying_transfers
+            ADD CONSTRAINT fk_laying_created_by
+            FOREIGN KEY (created_by)
+            REFERENCES users(id)
+            ON DELETE RESTRICT ON UPDATE CASCADE;
+    END IF;
+END $$;
+
+-- INDEXES
+CREATE INDEX IF NOT EXISTS idx_laying_transfers_from_project_flock_id ON laying_transfers(from_project_flock_id);
+CREATE INDEX IF NOT EXISTS idx_laying_transfers_to_project_flock_id ON laying_transfers(to_project_flock_id);
+CREATE INDEX IF NOT EXISTS idx_laying_transfers_created_by ON laying_transfers(created_by);
+CREATE INDEX IF NOT EXISTS idx_laying_transfers_deleted_at ON laying_transfers(deleted_at);