Fix scoring rules keyword matching (#473)

Fixs for #460 

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

## Release Notes

* **Improvements**
* Refined keyword matching in indexer queries with case-insensitive,
word-boundary-aware search for more accurate results.

* **Bug Fixes**
  * Corrected torrent URL redirect resolution logic.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

media_manager/indexer/utils.py

@@ -1,4 +1,5 @@
 import logging
+import re
 from urllib.parse import urljoin
 
 import requests
@@ -23,7 +24,7 @@ def evaluate_indexer_query_result(
                 log.debug(f"Applying rule {rule.name} to {query_result.title}")
                 if (
                     any(
-                        keyword.lower() in query_result.title.lower()
+                        re.search(rf"\b{re.escape(keyword)}\b", query_result.title, re.IGNORECASE)
                         for keyword in rule.keywords
                     )
                     and not rule.negate
@@ -34,7 +35,7 @@ def evaluate_indexer_query_result(
                     query_result.score += rule.score_modifier
                 elif (
                     not any(
-                        keyword.lower() in query_result.title.lower()
+                        re.search(rf"\b{re.escape(keyword)}\b", query_result.title, re.IGNORECASE)
                         for keyword in rule.keywords
                     )
                     and rule.negate
@@ -155,5 +156,3 @@ def follow_redirects_to_final_torrent_url(
         )
         msg = "An error occurred during the request"
         raise RuntimeError(msg) from e
-
-    return current_url