Refactor: Enhance Workflow Nodes for Clearer Exception Handling

[laipz8200]

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1. Is this request related to a challenge you're experiencing? Tell me about your story.

In order to improve the clarity and maintainability of exception handling in our workflow nodes, the following changes are proposed:

1. Create Specific Error Types for Each Node: Define unique error types for individual nodes to avoid using generic exceptions such as ValueError. This change will help in distinguishing different failure scenarios more precisely.

2. Return NodeRunResult with Exception Details: When possible, return a NodeRunResult that includes comprehensive exception information rather than raising uncategorized exceptions without context. This approach provides better context for error handling and improves debugging and traceability throughout the workflow.

Implementing these changes will contribute to more robust error handling, enhancing both developer experience and system reliability.

2. Additional context or comments

• ListOperator @laipz8200 in refactor(list_operator): refine exception handling for error specificity #10206
• DocumentExtractor @laipz8200 in refactor(document_extractor): update base exception class #10208
• CodeNode @laipz8200 in refactor(workflow): introduce specific exceptions for code validation #10218
• HttpRequestNode @laipz8200 in refactor(http_request): add custom exception handling for HTTP request nodes #10219
• LLMNode @laipz8200 in refactor(workflow): introduce specific error handling for LLM nodes #10221
• ParameterExtractorNode @laipz8200 in refactor(parameter_extractor): implement custom error classes #10260
• QuestionClassifierNode @laipz8200 in refactor(question_classifier): improve error handling with custom exceptions #10365
• ToolNode @laipz8200 in refactor(tool-node): introduce specific exceptions for tool node errors #10357
• KnowledgeRetrievalNode @laipz8200 in refactor(knowledge-retrieval): improve error handling with custom exceptions #10385
• IterationNode @laipz8200 in refactor(iteration): introduce specific exceptions for iteration errors #10366

3. Can you help us with this feature?

• I am interested in contributing to this feature.