feat: completed telegram integration into the application

fix: chat inference to respond user queries, nurses tab for rostering,discharge,handover works

person A updated, Wiki → 10 pages, Evals/RAGAS, Langfuse traces on retrieval, Telegram notification channel, Postgres-backed mini calendar MCP (book / cancel / change)

feat(person-b): implement Patient Flow — appointments, discharge, clerical

added foundaiton