fix loading of .env files

src/wattanalyse/__init__.py

@@ -1,5 +1,6 @@
 import os
 import sys
+from pathlib import Path
 
 import dotenv
 
@@ -9,4 +10,8 @@ if sys.stdout is None:
 if sys.stderr is None:
     sys.stderr = open(os.devnull, "w", encoding="utf-8")
 
-dotenv.load_dotenv()
+deploy_env_pth = Path(sys.executable).parent / ".env"
+if deploy_env_pth.exists():
+    dotenv.load_dotenv(dotenv_path=deploy_env_pth)
+else:
+    dotenv.load_dotenv()

src/wattanalyse/constants.py

@@ -2,6 +2,7 @@ from __future__ import annotations
 
 import enum
 import os
+import uuid
 from pathlib import Path
 from typing import Final
 
@@ -15,7 +16,10 @@ LIB_PATH: Final[Path] = Path(__file__).resolve().parent
 
 
 BASE_PATH = io_.search_folder_path(
-    LIB_PATH, stop_folder_name=os.getenv("DOPT_STOP_FOLDER_NAME", "python")
+    LIB_PATH,
+    stop_folder_name=os.getenv(
+        "DOPT_STOP_FOLDER_NAME", str(uuid.uuid4())
+    ),  # random default to provoke early failures
 )
 assert BASE_PATH, "base path not found"
 
@@ -28,6 +32,7 @@ class Config:
     PTH_USER_CFG: Path = BASE_PATH / os.getenv("DOPT_PATH_CONFIG", "config/wattana.toml")
 
 
+assert Config.PTH_USER_CFG.exists(), "user config not found"
 user_cfg = configs.load_toml(Config.PTH_USER_CFG)
 USER_CFG: t.UserConfig = t.UserConfig(
     Datenbank=t.UserConfig_Datenbank(**user_cfg["Datenbank"]),