feat: add logging setup and standalone mode detection to LoRA Manager

- Initialize logging configuration via `setup_logging()` when not in standalone mode
- Detect standalone mode using environment variables `LORA_MANAGER_STANDALONE` and `HF_HUB_DISABLE_TELEMETRY`
- Remove redundant `STANDALONE_MODE` variable that previously checked `sys.modules`

py/utils/logging_config.py

@@ -0,0 +1,26 @@
+import logging
+import os
+
+def setup_logging():
+    """
+    Sets up a global log record factory that prepends '[LoRA-Manager]' to all logs
+    generated by this extension.
+    """
+    # project_root should be the parent of the directory containing this file (py/utils/logging_config.py)
+    # So project_root is ComfyUI-Lora-Manager/
+    project_root = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+    prefix = "[LoRA-Manager] "
+
+    old_factory = logging.getLogRecordFactory()
+    def factory(*args, **kwargs):
+        record = old_factory(*args, **kwargs)
+        
+        # Check if the log is coming from our extension
+        # We use pathname to verify if it's within our project directory
+        if record.pathname and os.path.abspath(record.pathname).startswith(project_root):
+            if isinstance(record.msg, str) and not record.msg.startswith(prefix):
+                record.msg = f"{prefix}{record.msg}"
+        
+        return record
+
+    logging.setLogRecordFactory(factory)