Add year support to anime folder names

- Add year property to Serie entity with name_with_year
- Add year column to AnimeSeries database model
- Add get_year() method to AniworldLoader provider
- Extract year from folder names before fetching from API
- Update SerieScanner to populate year during rescan
- Update add_series endpoint to fetch and store year
- Optimize: check folder name for year before API call

src/core/providers/aniworld_provider.py

@@ -380,6 +380,54 @@ class AniworldLoader(Loader):
         logging.warning(f"No title found for key: {key}")
         return ""
 
+    def get_year(self, key: str) -> int | None:
+        """Get anime release year from series key.
+        
+        Attempts to extract the year from the series page metadata.
+        Returns None if year cannot be determined.
+        
+        Args:
+            key: Series identifier
+            
+        Returns:
+            int or None: Release year if found, None otherwise
+        """
+        logging.debug(f"Getting year for key: {key}")
+        try:
+            soup = BeautifulSoup(
+                self._get_key_html(key).content,
+                'html.parser'
+            )
+            
+            # Try to find year in metadata
+            # Check for "Jahr:" or similar metadata fields
+            for p_tag in soup.find_all('p'):
+                text = p_tag.get_text()
+                if 'Jahr:' in text or 'Year:' in text:
+                    # Extract year from text like "Jahr: 2025"
+                    match = re.search(r'(\d{4})', text)
+                    if match:
+                        year = int(match.group(1))
+                        logging.debug(f"Found year in metadata: {year}")
+                        return year
+            
+            # Try alternative: look for year in genre/info section
+            info_div = soup.find('div', class_='series-info')
+            if info_div:
+                text = info_div.get_text()
+                match = re.search(r'\b(19\d{2}|20\d{2})\b', text)
+                if match:
+                    year = int(match.group(1))
+                    logging.debug(f"Found year in info section: {year}")
+                    return year
+            
+            logging.debug(f"No year found for key: {key}")
+            return None
+            
+        except Exception as e:
+            logging.warning(f"Error extracting year for key {key}: {e}")
+            return None
+
     def _get_key_html(self, key: str):
         """Get cached HTML for series key.