initial: import DOLPHIN baseline 2026-04-21 from dolphinng5_predict working tree

Includes core prod + GREEN/BLUE subsystems:
- prod/ (BLUE harness, configs, scripts, docs)
- nautilus_dolphin/ (GREEN Nautilus-native impl + dvae/ preserved)
- adaptive_exit/ (AEM engine + models/bucket_assignments.pkl)
- Observability/ (EsoF advisor, TUI, dashboards)
- external_factors/ (EsoF producer)
- mc_forewarning_qlabs_fork/ (MC regime/envelope)

Excludes runtime caches, logs, backups, and reproducible artifacts per .gitignore.

prod/prefect_services/watchdog_service_prefect.py

@@ -0,0 +1,56 @@
+#!/usr/bin/env python3
+"""System Watchdog Service - Prefect Managed"""
+import subprocess
+import sys
+import time
+from prefect import flow, task, get_run_logger
+
+SERVICE_SCRIPT = "/mnt/dolphinng5_predict/prod/system_watchdog_service.py"
+
+@task
+def check_safety() -> bool:
+    """Check if Safety data is in Hz."""
+    try:
+        import hazelcast
+        client = hazelcast.HazelcastClient(
+            cluster_name="dolphin",
+            cluster_members=["127.0.0.1:5701"],
+        )
+        safety = client.get_map('DOLPHIN_SAFETY').blocking()
+        data = safety.get('latest')
+        client.shutdown()
+        return data is not None
+    except:
+        return False
+
+@flow(name="watchdog-service")
+def watchdog_service_flow():
+    """Manage System Watchdog Service."""
+    logger = get_run_logger()
+    logger.info("Starting Watchdog Service...")
+    
+    proc = subprocess.Popen(
+        [sys.executable, SERVICE_SCRIPT],
+        stdout=subprocess.PIPE,
+        stderr=subprocess.STDOUT,
+        universal_newlines=True
+    )
+    
+    logger.info(f"Watchdog started (PID: {proc.pid})")
+    
+    try:
+        while True:
+            time.sleep(60)
+            if proc.poll() is not None:
+                logger.error("Watchdog died, restarting...")
+                proc = subprocess.Popen([sys.executable, SERVICE_SCRIPT])
+            else:
+                healthy = check_safety()
+                logger.info(f"Safety data: {'✅' if healthy else '⏳'}")
+    except KeyboardInterrupt:
+        logger.info("Stopping Watchdog...")
+        proc.terminate()
+        proc.wait()
+
+if __name__ == "__main__":
+    watchdog_service_flow()