fix duplicate artist and album color entry in db

+ Remove folder store
+ Reduce fuzzy search score cutoff from 90% to 75%
+ use inheritance to init Artist class
+ misc

app/db/sqlite/artists.py

@@ -3,27 +3,27 @@ Contains methods for reading and writing to the sqlite artists database.
 """
 
 import json
+from sqlite3 import Cursor
+
 from .utils import SQLiteManager
 
 
 class SQLiteArtistMethods:
-    @classmethod
-    def insert_one_artist(cls, artisthash: str, colors: str | list[str]):
+    @staticmethod
+    def insert_one_artist(cur: Cursor, artisthash: str, colors: str | list[str]):
         """
         Inserts a single artist into the database.
         """
-        sql = """INSERT INTO artists(
+        sql = """INSERT OR REPLACE INTO artists(
             artisthash,
             colors
             ) VALUES(?,?)
             """
         colors = json.dumps(colors)
+        cur.execute(sql, (artisthash, colors))
 
-        with SQLiteManager() as cur:
-            cur.execute(sql, (artisthash, colors))
-
-    @classmethod
-    def get_all_artists(cls):
+    @staticmethod
+    def get_all_artists():
         """
         Get all artists from the database and return a generator of Artist objects
         """