feat: optimize scraping for multi-server compatibility

- Add studio, country, runtime tags to NFO generation
- Fix Fanart naming: showbackground→fanart (recognized by Jellyfin/Emby)
- Add image alias system: backdrop↔fanart, thumb↔landscape
- Merge image sources from all modules instead of first-wins
- Add CLEARART and LANDSCAPE scraping metadata types
- Extend season scraping with backdrop and landscape support

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

app/modules/themoviedb/scraper.py

@@ -301,6 +301,17 @@ class TmdbScraper:
         # 内容分级
         if content_rating := mediainfo.content_rating:
             DomUtils.add_node(doc, root, "mpaa", content_rating)
+        # 制作公司
+        for company in mediainfo.production_companies or []:
+            if company.get("name"):
+                DomUtils.add_node(doc, root, "studio", company.get("name"))
+        # 制作国家
+        for country in mediainfo.production_countries or []:
+            if country.get("name"):
+                DomUtils.add_node(doc, root, "country", country.get("name"))
+        # 时长
+        if mediainfo.runtime:
+            DomUtils.add_node(doc, root, "runtime", str(mediainfo.runtime))
 
         return doc