Update app.py: humanise voice, narrative, captions

Update README.md: humanise voice, narrative, captions

Drop gradio-client>=2 pin (gradio 5.7.1 bundles 1.5.0); pin websockets 12.x for sync client

Use WebSocket protocol (matches openenv) — all action buttons should work now

UX: clearer placeholder text after reset (no longer says Click Reset)

Bump gradio 4.44->5.7.1 (HfFolder removed in huggingface_hub 1.x; gradio 4.x is incompat)

Rewrite app.py: drop openenv-core, use plain httpx (resolves websockets conflict)

Strip openenv-core dep, use plain httpx (resolves websockets conflict)

Bump Gradio 4.44->5.7.1 (resolves websockets<13 vs openenv-core>=15 conflict)

Pin python_version=3.11 (Pillow build fails on 3.13)

Initial deploy: play-as-on-call-engineer Gradio demo

initial commit