remove ambiguous moderation rows, replace with clear-cut examples

replace ambiguous salary issue with date format fix

remove ambiguous LR fix — identify-only, any valid LR works

fix moderation issue row collisions and verify all data

add moderation task to Gradio demo replay

add toxic/biased response issue to alignment task

replace ambiguous fixes with deterministic ones across all tasks

demo only proposes logically inferrable fixes

fix alignment demo trajectory to use correct clean values for fixes

improve alignment task: replace label swaps with real contamination

add alignment data QA task: 12 issues in LLM instruction-tuning data

expand datasets to include harder real-world scenarios

add fix stage+demo