refactor: get_magnet to get_download_link

Rename scraper method get_magnet -> get_download_link in monkrus, rutracker and uztracker. Update downloader code to call .get_download_link and use the .is_magnet flag on tracker objects (replace dict access). Switch direct_download package imports to absolute paths and perform a small import reorder in direct_download/utils.py. These changes unify the download API and adapt call sites to the new tracker interface.

src/data/sources/monkrus.py

@@ -74,5 +74,5 @@ class MonkrusScraper:
 
         return filtered_posts
 
-    def get_magnet(self, post: Dict):
+    def get_download_link(self, post: Dict):
         return get_magnet_link(post["url"])

src/data/sources/rutracker.py

@@ -40,7 +40,7 @@ class RutrackerScraper:
             consoleLog("No response from server, returning nothing")
             return []
 
-    def get_magnet(self, post: Dict):
+    def get_download_link(self, post: Dict):
         _, post_links, _, _, _ = format_data([post])
         return get_magnet_link(post_links[0])
 

src/data/sources/uztracker.py

@@ -45,6 +45,6 @@ class UztrackerScraper:
             consoleLog(f"Failed to fetch {search_url}: {e}")
             return None
 
-    def get_magnet(self, post: Dict):
+    def get_download_link(self, post: Dict):
         return get_magnet_link(post["url"])