Add configurable logging level via --log-level option and GRAFITO_LOG_LEVEL environment variable

[Copilot]

This PR implements configurable logging levels as requested in the issue. Previously, Grafito was hardcoded to use DEBUG logging level, which could be too verbose for production use or insufficient for troubleshooting.

Changes

Added --log-level command line option that accepts the following log levels:

• TRACE - Most verbose, shows all log messages
• DEBUG - Default level, includes debug information
• INFO - General information messages
• NOTICE - Notable events
• WARN - Warning messages
• ERROR - Error messages only
• FATAL - Only fatal errors

Added GRAFITO_LOG_LEVEL environment variable support as documented in the CLI help. The environment variable is used as a fallback when no command line option is provided.

Updated CLI usage message to document both the command line option and environment variable, making it clear to users how to control logging verbosity.

Usage Examples

# Set log level via command line
grafito --log-level=INFO --port=8080

# Set log level via environment variable
GRAFITO_LOG_LEVEL=WARN grafito

# Command line takes precedence over environment variable
GRAFITO_LOG_LEVEL=ERROR grafito --log-level=INFO  # Uses INFO level

Implementation Details

• Precedence: Command line option > Environment variable > Default (DEBUG)
• Case insensitive: Both --log-level=info and --log-level=INFO work
• Error handling: Invalid log levels fall back to DEBUG
• Backward compatibility: Default behavior remains unchanged (DEBUG level)

Technical Notes

Fixed a Crystal compatibility issue where Process::Status.system_exit_status was changed to exit_status in newer Crystal versions. This was preventing the application from building with Crystal 1.11.2.

All existing tests continue to pass, ensuring no regressions were introduced.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• d3fo0g5hm7lbuv.cloudfront.net
  • Triggering command: curl -fsSL REDACTED (dns block)
• esm.ubuntu.com
  • Triggering command: /usr/lib/apt/methods/https (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

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[ralsina]

Change the default to WARN

[ralsina]

Nah, not working for me