improved PA class __repr() to handle bytes and thumbnails and remove internal sql alchemy

shared.py

@@ -10,7 +10,15 @@ class PA:
     def __repr__(self):
         str=f"<{self.__class__.__name__}("
         for k, v in self.__dict__.items():
-            str += f"{k}={v!r}, "
+            if isinstance(v, (bytes, bytearray)):
+                str += f"{k}=<bytes>, "
+            elif k == "thumbnail":
+                str += f"{k}=<base64>, "
+            # skip internal state
+            elif k == "_sa_instance_state":
+                continue
+            else:
+                str += f"{k}={v!r}, "
         str=str.rstrip(", ") + ")>"
         return str