Refactor schema migrations, optimize queries, and improve data fetching logic

- Simplified `run_dev_queries` by delegating schema updates to `run_migrations` for consistency.
- Added universal `fetch_all_*_by_book` methods for streamlined data retrieval across repositories.
- Replaced nested query logic with batch fetching to improve performance and maintainability.
- Optimized HTML-to-text conversion by consolidating regex patterns with `LazyLock`.

src-tauri/src/domains/character/repo.rs

@@ -442,6 +442,24 @@ pub fn fetch_book_characters_attributes(conn: &Connection, user_id: &str, charac
     Ok(attributes)
 }
 
+pub fn fetch_all_character_attributes_by_book(conn: &Connection, user_id: &str, book_id: &str, lang: Lang) -> AppResult<Vec<BookCharactersAttributesTable>> {
+    let mut statement = conn
+        .prepare("SELECT bca.attr_id, bca.character_id, bca.user_id, bca.attribute_name, bca.attribute_value, bca.last_update FROM book_characters_attributes bca INNER JOIN book_characters bc ON bca.character_id = bc.character_id WHERE bca.user_id=?1 AND bc.book_id=?2")
+        .map_err(|_| AppError::Internal(if lang == Lang::Fr { "Impossible de récupérer les attributs des personnages.".to_string() } else { "Unable to retrieve character attributes.".to_string() }))?;
+    let attributes = statement
+        .query_map(params![user_id, book_id], |query_row| {
+            Ok(BookCharactersAttributesTable {
+                attr_id: query_row.get(0)?, character_id: query_row.get(1)?,
+                user_id: query_row.get(2)?, attribute_name: query_row.get(3)?,
+                attribute_value: query_row.get(4)?, last_update: query_row.get(5)?,
+            })
+        })
+        .map_err(|_| AppError::Internal(if lang == Lang::Fr { "Impossible de récupérer les attributs des personnages.".to_string() } else { "Unable to retrieve character attributes.".to_string() }))?
+        .collect::<Result<Vec<_>, _>>()
+        .map_err(|_| AppError::Internal(if lang == Lang::Fr { "Impossible de récupérer les attributs des personnages.".to_string() } else { "Unable to retrieve character attributes.".to_string() }))?;
+    Ok(attributes)
+}
+
 /// Fetches all synced characters for a user.
 /// * `conn` - Database connection
 /// * `user_id` - The unique identifier of the user