Add multi-destination logging: syslog and file support

Implement logging infrastructure for non-systemd platforms:

- Add src/logging.rs with syslog and file logging support
- New CLI flags: --syslog, --log-file, --log-file-daily
- Syslog uses libc directly with LOG_DAEMON facility
- File logging via tracing-appender with optional daily rotation

Update service scripts:
- OpenRC and FreeBSD rc.d now use --syslog by default
- Ensures logs are captured on platforms without journald

Default (stderr) behavior unchanged for systemd compatibility.
Log destination is selected at startup based on CLI flags.

Signed-off-by: Vladimir Krivopalov <argenet@yandex.ru>

Cargo.toml

@@ -47,6 +47,7 @@ bytes = "1.9"
 thiserror = "2.0"
 tracing = "0.1"
 tracing-subscriber = { version = "0.3", features = ["env-filter"] }
+tracing-appender = "0.2"
 parking_lot = "0.12"
 dashmap = "6.1"
 arc-swap = "1.7"