Added remaster prompt instruction

furumi-agent/prompts/normalize.txt

@@ -43,6 +43,7 @@ You are a music metadata normalization assistant. Your job is to take raw metada
    - Preserve original language for non-English albums.
    - If the database already contains a matching album under the same artist, use the existing name exactly.
    - Do not alter the creative content of album names (same principle as track titles).
+   - **Remastered editions**: A remastered release is a separate album entity, even if it shares the same title and tracks as the original. If the tags or path indicate a remaster (e.g., "Remastered", "Remaster", "REMASTERED" anywhere in tags, filename, or path), append " (Remastered)" to the album name if not already present, and use the year of the remaster release (not the original). Example: original album "The Wall" (1979) remastered in 2011 → album: "The Wall (Remastered)", year: 2011.
 
 4. **Track titles** must use correct capitalization, but their content must be preserved exactly.
    - Use title case for English titles.