glm-5.1 36319db10e Implement structured logging with tracing, dual output, and fail2ban-compatible format ...

- Add logging::init() with dual output (file + stdout) via tracing-subscriber Layer composition
- Support configurable log level via LoggingConfig.level and JSON/text format via LoggingConfig.format
- Create log file and parent directories when log_file_path is configured
- Add KvVisitor for custom key=value event field formatting
- Add log_request!, log_rate_limit!, log_upstream_error!, log_config_reload! macros
  with REQUEST, RATE_LIMIT, UPSTREAM_ERROR, CONFIG_RELOAD prefixes
- Add format_event_fields() for extracting structured fields from tracing events
- Add tracing-subscriber env-filter and json features to Cargo.toml
- Add unit tests for KvVisitor formatting, log macros, and init function
- Apply cargo fmt to existing tls/config.rs tests

2026-06-11 12:47:19 +00:00

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