add ramdisk, load AI model to ramdisk and start recognition from it

rewrite zmq to DEALER and ROUTER
add GET_USER command to get CurrentUser from Python
all auth is on the python side
inference run and validate annotations on python

Azaion.AI/annotation.pyx

@@ -1,13 +1,35 @@
+import msgpack
+
 cdef class Detection:
-    def __init__(self, double x, double y, double w, double h, int cls):
+    def __init__(self, double x, double y, double w, double h, int cls, double confidence):
         self.x = x
         self.y = y
         self.w = w
         self.h = h
         self.cls = cls
+        self.confidence = confidence
+
+    def __str__(self):
+        return f'{self.cls}: {self.x:.2f} {self.y:.2f} {self.w:.2f} {self.h:.2f}, prob: {(self.confidence*100):.1f}%'
 
 cdef class Annotation:
-    def __init__(self, bytes image_bytes, float time, list[Detection] detections):
+    def __init__(self, bytes image_bytes, long time, list[Detection] detections):
         self.image = image_bytes
         self.time = time
-        self.detections = detections
+        self.detections = detections if detections is not None else []
+
+    cdef bytes serialize(self):
+        return msgpack.packb({
+            "i": self.image,  # "i" = image
+            "t": self.time,  # "t" = time
+            "d": [  # "d" = detections
+                {
+                    "x": det.x,
+                    "y": det.y,
+                    "w": det.w,
+                    "h": det.h,
+                    "c": det.cls,
+                    "p": det.confidence
+                } for det in self.detections
+            ]
+        })