feat: add option to skip individual queries in batch mode

[costela]

This pull request introduces a new feature to allow skipping individual batch queries during tracing and refactors the Tracer implementation for improved maintainability. The most significant changes include adding a new configuration option, restructuring the Tracer to use a unified configuration object, and modifying context handling to support batch query skipping.

New Feature: Skipping Batch Queries

• Added a WithSkipBatchQueries option to enable skipping the tracing of individual batch queries while still tracing the batch itself.

Refactoring for maintainability and performance

• Replaced the flat fields in the Tracer struct (e.g., tracerAttrs, trimQuerySpanName) with a single embedded tracerConfig struct for better organization and scalability.
• Changed the startTimeCtxKey to an empty struct type to minimally reduce memory usage.

Closes #54

[Copilot]

Pull Request Overview

This PR introduces a new feature to allow skipping individual queries in batch mode and refactors the Tracer implementation for better maintainability and performance. Key changes include adding a new configuration option WithSkipBatchQueries, restructuring the Tracer struct to embed a unified tracerConfig, and replacing string-based context keys with dedicated struct types.

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
tracer.go	Refactored context key usage and added skip logic for batch query tracing.
options.go	Added a new option function to enable skipping batch queries.

[obitech]

Suggested change

	// WithSkipBatchQueries will disable tracing individuals batch queries, only tracing the batch itself