Handle missing NDA

Signed-off-by: Sacha Al Himdani <sacha@getprobo.com>

pkg/coredata/migrations/20251003T144148Z.sql

@@ -0,0 +1,7 @@
+ALTER TABLE trust_center_accesses ADD COLUMN nda_file_id TEXT;
+
+ALTER TABLE trust_center_accesses ADD CONSTRAINT trust_center_accesses_nda_file_id_fkey
+    FOREIGN KEY (nda_file_id)
+    REFERENCES files(id)
+    ON UPDATE CASCADE
+    ON DELETE RESTRICT;