v0.8.1

Patch release

• #381 — Fix background fine-tune jobs crashing with BrokenPipeError when tqdm flushes the closed stderr pipe of the background service. The train() call is now wrapped in redirect_stderr(io.StringIO()) so tqdm writes to an in-memory buffer instead of the dead pipe.
• #380 — Fix 7 pre-existing full-suite test failures that blocked CI green on main: url_safety shadowing in the security test fixtures and a vlm video load_video path mismatch. No runtime behavior change. Unit suite 7937 pass / 0 fail locally; CI test (3.11) drops from a 2h+ hang to ~15m.

See CHANGELOG.md for full details.