fix(lint): fix ruff import sorting and type annotation errors in config.py

Author: medeirosdev

src/trueentropy/config.py

@@ -28,7 +28,6 @@
 
 from dataclasses import dataclass
 
-
 # -----------------------------------------------------------------------------
 # Source Metadata
 # -----------------------------------------------------------------------------
@@ -166,7 +165,7 @@ def get_source_info(self, source: str) -> dict[str, bool]:
             "requires_network": source in NETWORK_SOURCES,
         }
 
-    def copy(self, **changes) -> "TrueEntropyConfig":
+    def copy(self, **changes) -> TrueEntropyConfig:
         """
         Create a copy of this config with optional changes.