feat: rebuild work queue api with fastapi and postgres

app/models.py

@@ -0,0 +1,76 @@
+from datetime import datetime
+from typing import Any, Literal
+from uuid import UUID
+
+from pydantic import BaseModel, ConfigDict, Field
+
+Status = Literal["queued", "dispatched", "in_progress", "blocked", "failed", "completed", "cancelled"]
+Outcome = Literal["success", "failed", "cancelled"]
+
+
+class ProjectCreate(BaseModel):
+    name: str
+    external_ref: str | None = None
+
+
+class ProjectUpdate(BaseModel):
+    name: str | None = None
+    external_ref: str | None = None
+
+
+class Project(BaseModel):
+    model_config = ConfigDict(from_attributes=True)
+
+    id: UUID
+    name: str
+    external_ref: str | None = None
+    created_at: datetime
+    updated_at: datetime
+
+
+class WorkCreate(BaseModel):
+    project_id: UUID | None = None
+    type: str
+    description: str
+    payload: dict[str, Any] | None = None
+    priority: int = Field(default=3, ge=1, le=5)
+    assigned_agent: str | None = None
+    created_by: str | None = None
+
+
+class WorkUpdate(BaseModel):
+    status: Status | None = None
+    outcome: Outcome | None = None
+    notes: str | None = None
+    assigned_agent: str | None = None
+
+
+class DispatchLog(BaseModel):
+    model_config = ConfigDict(from_attributes=True)
+
+    id: UUID
+    work_item_id: UUID
+    dispatched_at: datetime
+    agent: str
+    completed_at: datetime | None = None
+    outcome: Outcome | None = None
+
+
+class WorkItem(BaseModel):
+    model_config = ConfigDict(from_attributes=True)
+
+    id: UUID
+    project_id: UUID | None = None
+    type: str
+    description: str
+    payload: dict[str, Any] | None = None
+    priority: int
+    status: Status
+    assigned_agent: str | None = None
+    created_by: str | None = None
+    created_at: datetime
+    updated_at: datetime
+    completed_at: datetime | None = None
+    outcome: Outcome | None = None
+    notes: str | None = None
+    dispatch_log: list[DispatchLog] = []