fix: bare except (#1159)

Bare `except:` catches SystemExit and KeyboardInterrupt, which can:
- Mask Ctrl+C handling during long optimization runs
- Hide critical system signals
- Make debugging harder

Replacement by `except Exception:` preserves the same error handling while respecting
system-level exceptions.

Co-authored-by: Milo @KeloYuan

Signed-off-by: Bobby Noelte <b0661n0e17e@gmail.com>

src/akkudoktoreos/core/pydantic.py

@@ -133,8 +133,8 @@ class PydanticModelNestedValueMixin:
         try:
             self._validate_path_structure(path)
             pass
-        except:
-            raise ValueError(f"Path '{path}' is invalid")
+        except Exception as e:
+            raise ValueError(f"Path '{path}' is invalid: {e}")
         path = path.strip("/")
         # Use private data workaround
         # Should be: