feat: initialize managed portal

managed/store_dwell_alert/app/schemas.py

@@ -0,0 +1,23 @@
+from __future__ import annotations
+
+from dataclasses import dataclass, field
+
+
+@dataclass(slots=True)
+class PersonIdentity:
+    person_id: str
+    role: str = "customer"
+    track_id: str | None = None
+    state: str = "active"
+    dwell_seconds: int = 0
+    last_seen_ts: int = 0
+    pause_start_ts: int | None = None
+    embedding: list[float] = field(default_factory=list)
+
+
+@dataclass(slots=True)
+class AlertEvent:
+    event: str
+    camera_id: str
+    ts: str
+    payload: dict