feat(media-supply): add media resource supply marketplace

Introduce an end-to-end media-supply feature: tenant-side resource sync
service/worker backed by a Meijiequan supplier client, ops-side management
APIs, and admin/ops web views for resources, orders, favorites and
submission. Adds a shared digitocr helper, MediaSupply config blocks for
tenant and ops, shared types, and migrations for supplier media resources,
price overrides, customer visibility and order refunds.

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

server/configs/config.local.yaml.example

@@ -255,3 +255,35 @@ browser_fetch:
     - 502
     - 503
     - 504
+
+media_supply:
+  enabled: true
+  default_markup_percent: 50
+  minimum_markup_cents: 0
+  worker:
+    enabled: true
+    poll_interval: 5s
+    batch_size: 1
+    order_max_attempts: 3
+    sync_max_attempts: 2
+    backlink_sync_interval: 10m
+    backlink_batch_size: 20
+  meijiequan:
+    base_url: http://www.meijiequan.com
+    # 建议用环境变量注入，或放到未入库的 configs/config.local.yaml：
+    # export MEIJIEQUAN_USER_ID=962
+    # export MEIJIEQUAN_USERNAME=your-phone
+    # export MEIJIEQUAN_PASSWORD=your-password
+    user_id: ""
+    username: ""
+    password: ""
+    session_ttl: 4h
+    request_timeout: 30s
+    sync_page_delay: 800ms
+    sync_page_size: 100
+    max_sync_pages: 200
+    published_page_size: 20
+    published_max_pages: 3
+    search_options_ttl: 12h
+    upstream_lock_ttl: 2m
+    upstream_min_interval: 800ms