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/mypy/checker_state.py

@@ -0,0 +1,30 @@
+from __future__ import annotations
+
+from collections.abc import Iterator
+from contextlib import contextmanager
+from typing import Final
+
+from mypy.checker_shared import TypeCheckerSharedApi
+
+# This is global mutable state. Don't add anything here unless there's a very
+# good reason.
+
+
+class TypeCheckerState:
+    # Wrap this in a class since it's faster that using a module-level attribute.
+
+    def __init__(self, type_checker: TypeCheckerSharedApi | None) -> None:
+        # Value varies by file being processed
+        self.type_checker = type_checker
+
+    @contextmanager
+    def set(self, value: TypeCheckerSharedApi) -> Iterator[None]:
+        saved = self.type_checker
+        self.type_checker = value
+        try:
+            yield
+        finally:
+            self.type_checker = saved
+
+
+checker_state: Final = TypeCheckerState(type_checker=None)