chore(env): synchronize env.default and stabilize API config

Updated env.default with self-documenting comments and all active environment variables. Hardened conf/aether_api_config.py to ensure SMTP and FILES_PATH dictionaries are preserved during refactors. Integrated v3 websocket routes into Nginx template.

conf/aether_api_config.py

@@ -5,7 +5,7 @@ from typing import Any, Dict, List, Optional, Union
 
 class Settings(BaseSettings):
     AETHER_CFG: Dict[str, Any] = {
-        "id": os.getenv('AE_CFG_ID', '0')
+        "id": os.getenv('AE_CFG_ID', 0)
     }
     
     JWT_KEY: str = os.getenv('AE_API_JWT_KEY', 'EHmSXZFKfMEW65E8kxCKmQ')
@@ -48,8 +48,31 @@ class Settings(BaseSettings):
         "port": os.getenv('AE_REDIS_PORT', '6379')
     }
 
+    # --- CRITICAL CONFIGURATIONS ---
+    # The following dictionaries are REQUIRED by the application logic.
+    # Do not remove them during refactors, as the app (e.g., lib_email.py) 
+    # accesses these attributes directly on the settings object.
+
+    # Send SMTP Email
+    # Used by app/lib_email.py for outbound communications.
+    SMTP: Dict[str, str] = {
+        "server": os.getenv('AE_SMTP_SERVER', 'linode.oneskyit.com'),
+        "port": os.getenv('AE_SMTP_PORT', '465'),
+        "username": os.getenv('AE_SMTP_USERNAME', 'send_mail'),
+        "password": os.getenv('AE_SMTP_PASSWORD', 'set-in-ae-sql-db-cnf-tbl')
+    }
+
+    # Server Hosted File Paths
+    # Used extensively for file uploads, downloads, and exports.
+    FILES_PATH: Dict[str, str] = {
+        "hosted_files_root": os.getenv('AE_FILES_PATH_ROOT', '/srv/hosted_files'),
+        "hosted_tmp_root": os.getenv('AE_FILES_PATH_TMP', '/srv/hosted_tmp')
+    }
+
+    # --- END CRITICAL CONFIGURATIONS ---
+
     # CORS
     ORIGINS_REGEX: str = os.getenv('AE_API_ORIGINS_REGEX', '(https://.*\.oneskyit\.com)|(https://.*\.oneskyit\.com:4443)')
     ORIGINS: List[str] = ['https://oneskyit.com']
 
-settings = Settings()
+settings = Settings()