Implement pipeline logging with bounded channels and orchestrator integration

tooling/pipeline/includes/services/logging/log_entry.h

@@ -0,0 +1,41 @@
+/**
+ * @file services/logging/log_entry.h
+ * @brief POD struct representing a single log event in the pipeline.
+ *
+ * LogEntry is produced by PipelineLogger and consumed by LogWorker via
+ * BoundedChannel<LogEntry>. All fields are value types so entries are
+ * safely movable across the channel without shared ownership.
+ */
+
+#ifndef BIERGARTEN_PIPELINE_INCLUDES_SERVICES_LOGGING_LOG_ENTRY_H_
+#define BIERGARTEN_PIPELINE_INCLUDES_SERVICES_LOGGING_LOG_ENTRY_H_
+
+#include <chrono>
+#include <string>
+
+enum class LogLevel {
+  Debug,
+  Info,
+  Warn,
+  Error,
+};
+
+enum class PipelinePhase {
+  Startup,
+  UserGeneration,
+  BreweryAndBeerGeneration,
+  CheckinGeneration,
+  RatingGeneration,
+  FollowGeneration,
+  Teardown,
+};
+
+struct LogEntry {
+  std::chrono::system_clock::time_point timestamp =
+      std::chrono::system_clock::now();
+  LogLevel level;
+  PipelinePhase phase;
+  std::string message;
+};
+
+#endif  // BIERGARTEN_PIPELINE_INCLUDES_SERVICES_LOGGING_LOG_ENTRY_H_