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/freetree.py

@@ -0,0 +1,23 @@
+"""Generic node traverser visitor"""
+
+from __future__ import annotations
+
+from mypy.nodes import Block, MypyFile
+from mypy.traverser import TraverserVisitor
+
+
+class TreeFreer(TraverserVisitor):
+    def visit_block(self, block: Block) -> None:
+        super().visit_block(block)
+        block.body.clear()
+
+
+def free_tree(tree: MypyFile) -> None:
+    """Free all the ASTs associated with a module.
+
+    This needs to be done recursively, since symbol tables contain
+    references to definitions, so those won't be freed but we want their
+    contents to be.
+    """
+    tree.accept(TreeFreer())
+    tree.defs.clear()