improve query rewriter with legal examples

remove hardcoded key, deepseek-chat for drafting, reasoner for analysis

add query rewriter to fix retrieval

increase TOP_K to 15

fix UI, add conversational handling, sources below analysis, template filter

fix chroma download check

fix function order and complete drafting tab

add drafting tab

add Dockerfile and HF deployment config

add Procfile

Iroh v1 - Kenyan legal research tool