feat(library): exclude configured folders from scanning and analysis

api/openapi.yaml

@@ -2687,6 +2687,8 @@ components:
       type: object
       required: [id, name, type, nfs_server, nfs_export, nfs_options, local_path, tag_priority, scan_interval_minutes, accepts_uploads, write_template, status, status_message, last_scan_at, created_at, scan]
       properties:
+        excluded_dirs:
+          $ref: "#/components/schemas/ExcludedDirs"
         id:
           type: string
           format: uuid
@@ -2747,6 +2749,8 @@ components:
       type: object
       required: [name, type]
       properties:
+        excluded_dirs:
+          $ref: "#/components/schemas/ExcludedDirs"
         name:
           type: string
           maxLength: 100
@@ -2774,6 +2778,8 @@ components:
     SourcePatch:
       type: object
       properties:
+        excluded_dirs:
+          $ref: "#/components/schemas/ExcludedDirs"
         name:
           type: string
           maxLength: 100
@@ -2802,6 +2808,14 @@ components:
           description: |
             Шаблон пути новых файлов; пусто — убрать. Неверный синтаксис — `422 validation.template_invalid`
             с `params.reason`. Проверка обратимости не обязательна для сохранения — её показывает `write-template/check`.
+    ExcludedDirs:
+      type: array
+      maxItems: 100
+      description: Literal folder paths relative to the storage root, including all descendants. Case sensitive; no glob matching. Empty list clears exclusions. Existing library records are retained, but their scan and analysis are skipped. Changes require no running scan.
+      items:
+        type: string
+        minLength: 1
+        maxLength: 1000
     SourceTestResult:
       type: object
       required: [ok, message, audio_files]