refactor(nodes): standardize node class names with LM suffix

Rename all node classes to use consistent 'LM' suffix pattern:
- LoraCyclerNode → LoraCyclerLM
- LoraManagerLoader → LoraLoaderLM
- LoraManagerTextLoader → LoraTextLoaderLM
- LoraStacker → LoraStackerLM
- LoraRandomizerNode → LoraRandomizerLM
- LoraPoolNode → LoraPoolLM
- WanVideoLoraSelectFromText → WanVideoLoraTextSelectLM
- DebugMetadata → DebugMetadataLM
- TriggerWordToggle → TriggerWordToggleLM
- PromptLoraManager → PromptLM

Updated:
- Core node class definitions (9 files)
- NODE_CLASS_MAPPINGS in __init__.py
- Node type mappings in node_extractors.py
- All related test imports and references
- Logger prefixes for consistency

Frontend extension names remain unchanged (LoraManager.LoraStacker, etc.)

py/nodes/lora_pool.py

@@ -10,7 +10,7 @@ import logging
 logger = logging.getLogger(__name__)
 
 
-class LoraPoolNode:
+class LoraPoolLM:
     """
     A node that defines LoRA filter criteria through a Vue-based widget.
 
@@ -67,7 +67,7 @@ class LoraPoolNode:
         filters = pool_config.get("filters", self._default_config()["filters"])
 
         # Log for debugging
-        logger.debug(f"[LoraPoolNode] Processing filters: {filters}")
+        logger.debug(f"[LoraPoolLM] Processing filters: {filters}")
 
         return (filters,)