feat: indie status page MVP -- FastAPI + SQLite

- 8 DB models (services, incidents, monitors, subscribers, etc.)
- Full CRUD API for services, incidents, monitors
- Public status page with live data
- Incident detail page with timeline
- API key authentication
- Uptime monitoring scheduler
- 13 tests passing
- TECHNICAL_DESIGN.md with full spec

venv/lib/python3.11/site-packages/starlette/background.py

@@ -0,0 +1,36 @@
+from __future__ import annotations
+
+from collections.abc import Callable, Sequence
+from typing import Any, ParamSpec
+
+from starlette._utils import is_async_callable
+from starlette.concurrency import run_in_threadpool
+
+P = ParamSpec("P")
+
+
+class BackgroundTask:
+    def __init__(self, func: Callable[P, Any], *args: P.args, **kwargs: P.kwargs) -> None:
+        self.func = func
+        self.args = args
+        self.kwargs = kwargs
+        self.is_async = is_async_callable(func)
+
+    async def __call__(self) -> None:
+        if self.is_async:
+            await self.func(*self.args, **self.kwargs)
+        else:
+            await run_in_threadpool(self.func, *self.args, **self.kwargs)
+
+
+class BackgroundTasks(BackgroundTask):
+    def __init__(self, tasks: Sequence[BackgroundTask] | None = None):
+        self.tasks = list(tasks) if tasks else []
+
+    def add_task(self, func: Callable[P, Any], *args: P.args, **kwargs: P.kwargs) -> None:
+        task = BackgroundTask(func, *args, **kwargs)
+        self.tasks.append(task)
+
+    async def __call__(self) -> None:
+        for task in self.tasks:
+            await task()