updated code blank value fix

Author: AjitPadhi-Microsoft

src/api/app.py

@@ -26,14 +26,22 @@
 # Load environment variables
 load_dotenv()
 
+
+def _get_env_or_default(key: str, default: str) -> str:
+    """Get environment variable with fallback for empty/whitespace values."""
+    value = os.getenv(key)
+    return value.strip().upper() if value and value.strip() else default.upper()
+
+
 # Configure logging
 # Basic application logging (default: INFO level)
-AZURE_BASIC_LOGGING_LEVEL = os.getenv("AZURE_BASIC_LOGGING_LEVEL", "INFO").upper()
+AZURE_BASIC_LOGGING_LEVEL = _get_env_or_default("AZURE_BASIC_LOGGING_LEVEL", "INFO")
 # Azure package logging (default: WARNING level to suppress INFO)
-AZURE_PACKAGE_LOGGING_LEVEL = os.getenv("AZURE_PACKAGE_LOGGING_LEVEL", "WARNING").upper()
+AZURE_PACKAGE_LOGGING_LEVEL = _get_env_or_default("AZURE_PACKAGE_LOGGING_LEVEL", "WARNING")
 # Azure logging packages (default: empty list)
-azure_logging_packages_env = os.getenv("AZURE_LOGGING_PACKAGES")
-AZURE_LOGGING_PACKAGES = azure_logging_packages_env.split(",") if azure_logging_packages_env else []
+AZURE_LOGGING_PACKAGES = [
+    pkg.strip() for pkg in os.getenv("AZURE_LOGGING_PACKAGES", "").split(",") if pkg.strip()
+]
 
 # Basic config: logging.basicConfig(level=logging.INFO)
 logging.basicConfig(