chore: refine UDF transport error messaging

[BohuTANG]

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Summary

• refines UDF Flight error handling to categorize transport, server, schema, and data issues, returning actionable hints
• aligns retry logic with the new transport detection so we avoid futile retries when the stream drops mid-flight

Tests

• Unit Test
• Logic Test
• Benchmark Test
• No Test - Explain why

Type of change

• Bug Fix (non-breaking change which fixes an issue)
• New Feature (non-breaking change which adds functionality)
• Breaking Change (fix or feature that could cause existing functionality not to work as expected)
• Documentation Update
• Refactoring
• Performance Improvement
• Other (please describe):

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This change is