fix: widen fastapi constraint to allow starlette CVE-2025-62727 fix

The tight `fastapi>=0.115.0,<0.116` pin caps starlette at `<0.47.0`,
blocking the fix for CVE-2025-62727 which requires starlette>=0.49.1.

Widened to `fastapi>=0.115.0,<0.136`. The SDK only uses stable public
APIs (FastAPI, Request, StreamingResponse, BaseHTTPMiddleware, Depends)
that are unchanged across these versions. All 501 SDK tests pass.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: scale-ballen

pyproject.toml

@@ -18,7 +18,7 @@ dependencies = [
     "typer>=0.16,<0.17",
     "questionary>=2.0.1,<3",
     "rich>=13.9.2,<14",
-    "fastapi>=0.115.0,<0.116",
+    "fastapi>=0.115.0,<0.136",
     "uvicorn>=0.31.1",
     "watchfiles>=0.24.0,<1.0",
     "python-on-whales>=0.73.0,<0.74",