refactor: migrate workflow actions to runtime config snapshot

tests/fixtures/architecture/configuration-debt-baseline.json

@@ -9,7 +9,7 @@
     "root": "app"
   },
   "settings_imports": {
-    "count": 130,
+    "count": 127,
     "files": [
       "app/adapters/cache/backends.py",
       "app/adapters/cache/redis.py",
@@ -136,10 +136,7 @@
       "app/startup/modules_initializer.py",
       "app/startup/plugins_initializer.py",
       "app/startup/routers_initializer.py",
-      "app/workflow/actions/add_subscribe.py",
       "app/workflow/actions/fetch_medias.py",
-      "app/workflow/actions/fetch_rss.py",
-      "app/workflow/actions/scan_file.py",
       "app/workflow/actions/send_message.py"
     ]
   },