feat(orders): manual order optionally creates a linked project

Add `create_project` flag (default true) to `CreateOrderSchema` and
`CreateOrderData`. When true and `quotation_id` is absent, `createOrder`
creates a `projects` row sharing the order's shared-pool number and
`order_id` link — mirroring the from-quotation flow. The route audits
the new project creation when it occurs.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/schemas/orders.schema.ts

@@ -86,6 +86,10 @@ export const CreateOrderSchema = z.object({
   notes: z.string().nullish(),
   items: z.array(OrderItemSchema).optional(),
   sections: z.array(OrderSectionSchema).optional(),
+  create_project: z
+    .preprocess((v) => v === true || v === 1 || v === "1", z.boolean())
+    .optional()
+    .default(true),
 });
 
 export const UpdateOrderSchema = z.object({