Add microservices, web UI, and replay tooling

services/api/models.py

@@ -0,0 +1,13 @@
+from __future__ import annotations
+
+import datetime as dt
+from typing import Optional
+
+from sqlmodel import Field, SQLModel
+
+
+class User(SQLModel, table=True):
+    id: Optional[int] = Field(default=None, primary_key=True)
+    username: str = Field(index=True, unique=True)
+    password_hash: str
+    created_at: dt.datetime = Field(default_factory=lambda: dt.datetime.now(dt.timezone.utc))