Sync requests-based SDK in clients/python/. Wraps /healthz, /run, /files,
and /admin/tokens behind a Forge class with typed exceptions
(ForgeError + Transport/API/Auth subclasses) and dataclass response shapes
(RunResult, FileToken, AppToken). HTTP timeout = run timeout + 30s margin,
matching the pattern cauldron has been running inline. No retries —
caller's job since /run isn't idempotent.
24 unit tests via responses, all passing. Install with
pip install -e clients/python/.
