Hackathon submission: new README (3-5 min read), BLOG.md narrative, frontier baselines, design-principles framing

Phase X1-X3: strip handoff_notes from SFT data + add schema guardrail

Add 48 SFT trajectories: 10 judgment_call + 10 cascading_failure + 8 capacity_crisis + 8 broken_pipeline + 6 clean_deploy + 6 random_incident

Resolve merge: union of Gajanand + Likith trajectories

Phase 6.5 SFT: 13 trajectories for tasks 1, 2, 6 (Likith)

Phase 6.5 SFT: 12 trajectories for tasks 3, 4, 5 (Gajanand)

Phase 6.5 fix (5/5): SFT trajectories (5 seeds) + template doc