feat(projects): auto-create NAS folder for order-spawned projects

Manual project creation already creates the 02_PROJEKTY/<number>_<name>
folder (projects.service.createProject). Projects created from an order —
both from an accepted offer (createOrderFromQuotation) and a manual
offer-less order (createOrder) — did not, so they had no NAS folder until
a user opened the project and clicked "create folder" or uploaded a file.

- orders.service: best-effort, non-fatal createProjectFolder after each
  project-creating transaction commits (mirrors createProject; gated on
  isConfigured(), logs on failure, never rolls back the order).
- projects.service: log when the existing auto-create returns false
  (was silently discarded — CLAUDE.md known-issue #4).
- nas-file-manager: optional constructor basePath seam for tests.
- tests: NasFileManager.createProjectFolder coverage — naming, idempotency,
  Czech diacritics, empty name, not-mounted (152 -> 158 tests).

Bump version to 2.0.3.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/services/projects.service.ts

@@ -189,10 +189,16 @@ export async function createProject(data: CreateProjectInput) {
   });
 
   if (project.project_number && nasFileManager.isConfigured()) {
-    nasFileManager.createProjectFolder(
+    const created = nasFileManager.createProjectFolder(
       project.project_number,
       project.name || "",
     );
+    if (!created) {
+      console.error(
+        "[projects.service] NAS folder not created for project",
+        project.project_number,
+      );
+    }
   }
 
   return project;