Integrate GORM Logger with Zerolog and Add Configuration Options for Logging and Performance

[nadongjun]

• have read the CONTRIBUTING.md file
• raised a GitHub issue or discussed it on the projects chat beforehand
• added unit tests
• added integration tests
• updated documentation if needed
• updated CHANGELOG.md

This PR integrates the GORM logger with zerolog to detect database-related bottlenecks. With this integration, the log level now follows the level set in zerolog (e.g., debug.level), ensuring consistent and detailed logging for database operations.

To activate database debugging, make sure to set log.level to debug and database.debug to true.

Additionally, custom configuration options for GORM have been added. Example configurations can be found in config-example.yaml. The available options include:

Options:

config-example.yaml

database:
...
  # Enable debug mode. Set log.level to "debug".
  debug: false

  # GORM configuration settings.
  gorm:
    # Enable prepared statements.
    prepare_stmt: true

    # Enable parameterized queries.
    parameterized_queries: true

    # Skip logging "record not found" errors.
    skip_err_record_not_found: true

    # Threshold for slow queries in milliseconds.
    slow_threshold: 1000

1. Log Options:

• SlowThreshold (ms): Sets the duration threshold for logging slow queries.
• ParameterizedQueries (bool): Provides the option to enable query caching. This option is enabled by default in Postgres.
• SkipErrRecordNotFound (bool): Controls whether to skip logging "record not found" errors.

2. Statement Preparation Option:

• PrepareStmt (bool): Specifies whether SQL statements should be prepared.

These options support existing GORM settings and allow for flexible configuration tailored to different environments and needs.

Summary of Changes

• Integrated GORM logger with zerolog.
• Added custom GORM configuration options.

Example

• log.level: debug, database.debug: true, database.gorm.parameterized_queries: true
  
• log.level: debug, database.gorm.debug: true, database.gorm.parameterized_queries: false
  
• log.level: debug, database.gorm.debug: true, database.gorm.parameterized_queries: false, database.gorm.slow_threshold
  

Reference

• Statement preparation option
• Log option