Fix AttributeError: align field access with erspec snake_case convention

[Copilot]

Code was accessing erspec model fields using camelCase (ereRequestId, errorTitle) but LinkML generates snake_case attributes (ere_request_id, error_title), causing runtime AttributeError.

Changes

• Services layer (redis.py, __init__.py): Updated all log statements accessing request.ereRequestId → request.ere_request_id
• Adapters layer (redis.py, mock_resolver.py): Fixed field access in logging and EREErrorResponse construction

Example

# Before (runtime error)
log.debug(f"Request id: {request.ereRequestId}")
return EREErrorResponse(ereRequestId=id, errorTitle="...", errorType="...")

# After (correct)
log.debug(f"Request id: {request.ere_request_id}")
return EREErrorResponse(ere_request_id=id, error_title="...", error_type="...")

All erspec model field access now matches LinkML schema definitions.

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