rewrite api/artist.py to remove artist cache

+ remove processing taylor's version

app/utils/unicode.py

@@ -0,0 +1,8 @@
+def handle_unicode(string: str):
+    """
+    Try resolving unicode characters, else escape them.
+    """
+    return string.encode("utf-16", "replace").decode("utf-16")
+    # try:
+    # except:
+    # return string.encode("unicode_escape").decode("utf-8")