0.5.0: route logging through Gravity Forms' logging framework

[oxyc]

Summary

Follow-up to the 0.4.0 logging: instead of a custom "Debug logging" toggle + raw error_log, decisions now log through Gravity Forms' own logging framework (the GF convention).

Because the plugin already extends GFAddOn, it now appears under Forms → Settings → Logging as ALTCHA for Gravity Forms, with a per-add-on level (off / errors only / all) and a downloadable log file. Failures (fail / blocked / spam) log at error level, passes at debug — so "Log errors only" surfaces just the blocks.

altcha: fail {"form":43,"reason":"replay"}
rate_limit: blocked {"form":12}
content_filter: spam {"form":7,"score":3,"signals":["keyword"]}
email_validation: blocked {"form":7,"status":"undeliverable","domain":"example.com"}

• Drops the enable_logging setting, loggingEnabled(), the writeToErrorLog sink, and the genero/gravityforms_altcha/logging filter — GF's Logging UI controls verbosity now.
• Keeps the genero/gravityforms_altcha/log action for custom routing (Sentry, Query Monitor).
• Privacy unchanged: IPs as a salted hash, emails as domain only.

Verified on DDEV

• GF Logging add-on active; the add-on shows up in the Logging list as "ALTCHA for Gravity Forms"; the bridge runs and emits records. 56 unit+mocked tests green (PHP 8.2–8.4).

Bumps to 0.5.0.

🤖 Generated with Claude Code