feat(projects/orders): project status machine + bidirectional project-order sync; order reopen

- projects.service: VALID_TRANSITIONS (aktivni->dokonceny/zruseny,
  terminal->aktivni reopen), tolerant of legacy statuses; getProject returns
  valid_transitions; updateProject validates transitions (invalid_transition
  token -> Czech 400 in the route).
- NEW project->order cascade, transactional with the project update: finishing/
  cancelling a project completes/cancels its linked received order — only while
  the order is still open (never resurrects storno, never cancels completed);
  reopen never cascades. Direct tx write, no service recursion; cascaded order
  change gets its own audit row.
- orders.service: reopen edges (dokoncena/stornovana -> v_realizaci);
  syncProjectStatus is reopen-aware (reopen skips project sync) and returns
  the cascaded projects for per-project audit rows in the route.
- orders.schema: fix phantom 'zrusena' enum token -> canonical 'stornovana'
  (every storno PUT through the route 400ed with a raw English Zod message;
  latent until now because no UI sent it) + route-level regression test.
- NEW project-order-status-sync.test.ts: 15 tests — both cascade directions,
  guards, reopen-no-cascade, legacy tolerance, forward-sync regression.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/schemas/orders.schema.ts

@@ -36,7 +36,7 @@ export const CreateOrderSchema = z.object({
   quotation_id: nullableIntIdFromForm.nullish(),
   customer_id: nullableIntIdFromForm.nullish(),
   status: z
-    .enum(["prijata", "v_realizaci", "dokoncena", "zrusena"])
+    .enum(["prijata", "v_realizaci", "dokoncena", "stornovana"])
     .optional()
     .default("prijata"),
   currency: z.string().max(10).optional().default("CZK"),
@@ -52,7 +52,9 @@ export const CreateOrderSchema = z.object({
 
 export const UpdateOrderSchema = z.object({
   customer_order_number: z.string().max(100).nullish(),
-  status: z.enum(["prijata", "v_realizaci", "dokoncena", "zrusena"]).optional(),
+  status: z
+    .enum(["prijata", "v_realizaci", "dokoncena", "stornovana"])
+    .optional(),
   currency: z.string().max(10).optional(),
   language: z.string().max(5).optional(),
   scope_title: z.string().max(255).nullish(),