Logging and diagnostics improvements (#941)

Core logging and system diagnostics improvements, extracted from the compute branch.

### Logging
- **Elapsed timestamps**: Console log now shows elapsed time since launch `[HH:MM:SS.mmm]` instead of full date/time; file logging is unchanged
- **Short level names**: 3-letter short level names (`trc`/`dbg`/`inf`/`wrn`/`err`/`crt`) used by both console and file formatters via `ShortToStringView()`
- **Consistent field order**: Standardized to `[timestamp] [level] [logger]` across both console and file formatters
- **Slim LogMessage/LogPoint**: Remove redundant fields from `LogMessage` (derive level/source from `LogPoint`), flatten `LogPoint` to inline filename/line fields, shrink `LogLevel` to `int8_t` with `static_assert(sizeof(LogPoint) <= 32)`
- **Remove default member initializers** and static default `LogPoint` from `LogMessage` — all fields initialized by constructor
- **LoggerRef string constructor**: Convenience constructor accepting a string directly
- **Fix SendMessage macro collision**: Replace `thread.h` include in `logmsg.h` with a forward declaration of `GetCurrentThreadId()` to avoid pulling in `windows.h` transitively

### System Diagnostics
- **Cache static system metrics**: Add `RefreshDynamicSystemMetrics()` that only queries values that change at runtime (available memory, uptime, swap). `SystemMetricsTracker` snapshots full `GetSystemMetrics()` once at construction and reuses cached topology/total memory on each `Query()`, avoiding repeated `GetLogicalProcessorInformationEx` traversal on Windows, `/proc/cpuinfo` parsing on Linux, and `sysctl` topology calls on macOS

1 files changed, 6 insertions, 1 deletions

diff --git a/src/zencompute/include/zencompute/orchestratorservice.h b/src/zencompute/include/zencompute/orchestratorservice.h
index 071e902b3..549ff8e3c 100644
--- a/src/zencompute/include/zencompute/orchestratorservice.h
+++ b/src/zencompute/include/zencompute/orchestratorservice.h
@@ -7,6 +7,8 @@
 #if ZEN_WITH_COMPUTE_SERVICES
 
 #	include <zencore/compactbinary.h>
+#	include <zencore/compactbinarybuilder.h>
+#	include <zencore/logbase.h>
 #	include <zencore/thread.h>
 #	include <zencore/timer.h>
 #	include <zencore/uid.h>
@@ -164,7 +166,10 @@ private:
 
 	void RecordClientEvent(ClientEvent::Type Type, std::string_view ClientId, std::string_view Hostname);
 
-	bool m_EnableWorkerWebSocket = false;
+	LoggerRef Log() { return m_Log; }
+
+	LoggerRef m_Log{"compute.orchestrator"};
+	bool	  m_EnableWorkerWebSocket = false;
 
 	std::thread		  m_ProbeThread;
 	std::atomic<bool> m_ProbeThreadEnabled{true};