Finalize All Error Messages and OOD Messages

[nuwangeek]

Description

Define and finalize all error messages and out-of-domain (OOD) messages that should be sent to users across all workflows. Messages must be localized for Estonian (et) and English (en).

Message Categories

Service Workflow Errors

• SERVICE_NOT_FOUND_MESSAGES: No matching service found
• SERVICE_VALIDATION_FAILED_MESSAGES: Service exists but not active
• SERVICE_TIMEOUT_ERROR_MESSAGES: Service call timeout (>10s)
• SERVICE_EXECUTION_ERROR_MESSAGES: Service returned error
• ENTITY_EXTRACTION_FAILED_MESSAGES: LLM couldn't extract entities

Context Workflow Errors

• INSUFFICIENT_CONTEXT_MESSAGES: Query references history but no clear answer
• NO_CONTEXT_AVAILABLE_MESSAGES: No conversation history available

Greeting Messages

• GREETING_HELLO_MESSAGES: Response to hello/hi
• GREETING_GOODBYE_MESSAGES: Response to goodbye/bye
• GREETING_THANKS_MESSAGES: Response to thank you
• GREETING_CASUAL_MESSAGES: Response to casual greetings

OOD Messages (Existing - Verify Reuse)

• OUT_OF_SCOPE_MESSAGE: Query cannot be handled by any workflow
• TECHNICAL_ISSUE_MESSAGE: System error occurred
• INPUT_GUARDRAIL_VIOLATION_MESSAGE: Input blocked by guardrails
• OUTPUT_GUARDRAIL_VIOLATION_MESSAGE: Output blocked by guardrails

Acceptance Criteria

• Define all error messages in src/llm_orchestrator_config/llm_ochestrator_constants.py
• Ensure all messages have Estonian (et) and English (en) translations
• Add helper function get_localized_message(message_dict, language)
• Review messages with product/UX team
• Update specification document with final messages
• Add message usage examples in code comments