fix(config): Ensure API keys are loaded by orchestrator

- Reverts docker-compose.yml to use volume mount for gemini_api_key.txt, due to format constraints.
- Restores and refines Config.load_api_keys() in config.py.
- **Crucially, calls Config.load_api_keys() at the start of gtm_architect_orchestrator.py to ensure keys are loaded.**
- Adjusts _get_gemini_api_key in helpers.py to prioritize keys from Config.API_KEYS.
- This definitively addresses the 'API Key missing' error by guaranteeing key initialization.

helpers.py

@@ -294,31 +294,30 @@ def get_email_address(firstname, lastname, website):
 
 def _get_gemini_api_key():
     """
-    Retrieves Gemini API Key, prioritizing environment variables as the most robust method.
+    Retrieves Gemini API Key, prioritizing Config.API_KEYS after it has been loaded.
     """
     logger = logging.getLogger(__name__)
     logging.info("Attempting to retrieve Gemini API Key...")
 
-    # Primary Method: Environment Variable (most robust for Docker)
+    # Primary Method: From Config.API_KEYS (expected to be loaded by orchestrator)
+    api_key = Config.API_KEYS.get('gemini') or Config.API_KEYS.get('openai') # Check both slots
+    if api_key:
+        logging.info("Successfully loaded API key from Config.API_KEYS.")
+        return api_key
+
+    # Fallback 1: Environment Variable GEMINI_API_KEY
     api_key = os.environ.get("GEMINI_API_KEY")
     if api_key:
-        logging.info("Successfully loaded API key from GEMINI_API_KEY environment variable.")
+        logging.warning("Loaded API key from GEMINI_API_KEY environment variable (Config.API_KEYS was empty).")
         return api_key
 
-    # Fallback 1: Legacy Environment Variable
+    # Fallback 2: Legacy Environment Variable OPENAI_API_KEY
     api_key = os.environ.get("OPENAI_API_KEY")
     if api_key:
-        logging.warning("Loaded API key from legacy OPENAI_API_KEY environment variable.")
-        return api_key
-
-    # Fallback 2: File-based (less reliable with volume mounts)
-    logging.warning("Could not find API key in environment variables. Falling back to file-based method.")
-    api_key = Config.API_KEYS.get('openai') # Legacy slot in config
-    if api_key:
-        logging.info("Successfully loaded API key from config file.")
+        logging.warning("Loaded API key from legacy OPENAI_API_KEY environment variable (Config.API_KEYS was empty).")
         return api_key
             
-    logger.error("CRITICAL: No API Key found in environment variables or config file.")
+    logger.error("CRITICAL: No API Key found in Config.API_KEYS or environment variables.")
     raise ValueError("API Key missing.")
 
 @retry_on_failure