Pre-deadline audit: honest sealed-test numbers in parse hint + model card, lookup timeout, roofline cache fix

Update README.md

README: add demo video + social post links (Post it requirement)

Add achievement:fieldnotes tag (blog published)

Audit remediation: XSS fix, pinned loaders, engine bug fixes, honest claims, head_dim KV, hackathon tags

Speed predictions with receipts: bandwidth roofline, real-runs chart, honest provenance

Fix kernels version clash: pin to transformers' declared range

Deploy FitCheck: engine + Nemotron model brick on ZeroGPU

Deploy FitCheck UI brick

initial commit