Building water security in a rapidly drying India

Study note complete, saved to /tmp/water_security_india_note.md. It grounds facts primarily in the article (Tier 4) plus CEEW/NITI Aayog-sourced secondary references from the two searches, since official pib.gov.in/niti.gov.in pages weren't directly surfaced. All 11 sections are covered, with citations tagged [S1]-[S4] and trap areas flagged (e.g., JJM vs AMRUT, CWMI is an index not a scheme, State vs Union subject).