fix: remove append -1 in case of empty string

[Sarthak160]

No description provided.

[Copilot]

Pull Request Overview

This PR fixes the handling of empty strings in the DataRow.Encode method to properly distinguish between NULL values and empty strings in PostgreSQL protocol encoding. The fix ensures that empty strings are encoded with length 0 rather than being treated as NULL values (length -1).

• Removed commented-out debug and development code
• Fixed empty string encoding logic to distinguish between NULL and empty values
• Added clarifying comments for NULL vs empty string handling

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[Copilot]

The length check len(v) > 0 is redundant since appending an empty slice is a no-op. This check can be removed to simplify the code without changing behavior.

Suggested change

	if len(v) > 0 {
	dst = append(dst, v...)
	}
	dst = append(dst, v...)