fxthiry/Valerter v1.0.0-rc.5 on GitHub

Final RC - Hardening and observability improvements before 1.0.0 stable.

TCP keepalive - Prevents silent connection drops on long-lived VictoriaLogs streams (60s keepalive on reqwest client)
StreamBuffer size limit - 1MB max line size with valerter_lines_discarded_total{reason=oversized} metric to prevent OOM from malformed input
Strict config validation - deny_unknown_fields rejects typos, URL format validation for VictoriaLogs and webhook endpoints
Rust load-generator - High-performance testing tool achieving 100k logs/sec for stress testing
Comprehensive debug logging - Strategic debug/trace logs across all modules for troubleshooting
Performance test suite - Load testing scripts and documented results (10k+ logs/sec sustained)

Tracing span propagation - Use instrument() for async-safe span propagation in all notifier functions (engine, queue, mattermost, webhook, email)
Notification success logging - Promoted from debug to info level for production visibility
Metrics label cleanup - Removed unused rule_name label from alerts_dropped_total (global metric, not per-rule)
RUST_LOG support - Now properly respects environment variable for log filtering

Documentation overhaul - Rewrote README "Why Valerter" section, updated metrics docs with valerter_email_recipient_errors_total and valerter_notifier_config_errors_total, added performance report