evidence: source inventory for hypertension-control-global

[cschanhniem]

Summary

Completes the source-inventory literature-scout task for public-health/hypertension-control-global. One task, one role, one claim per record.

Adds 6 dated, classified evidence records with measured-BP discipline:

Source	Status	Why
NCD-RisC pooled analysis (Lancet 2021)	Usable	Measured-BP cascade, 184 countries, by sex/year
WHO STEPS microdata	Usable	Nationally representative measured-BP survey microdata
DHS Program biomarkers	Limited	BP only in subset of surveys; cascade items inconsistent
GBD 2021 high-SBP burden (IHME)	Limited	Attributable burden, not a measured control cascade
PURE study (JAMA 2013)	Limited	Non-representative cohorts, ages 35-70, 2003-2009
Self-report bias study (SSM-PH 2022)	Rejected (rule)	Self-report underestimates measured prevalence 20-55%

Also fixes a rotted URL in the pre-existing who-hypertension-2023 record (the WHO publication link 404'd; replaced with the stable WHO IRIS handle 10665/372896) and refreshes its access date.

Done condition satisfied: ≥4 sources classified usable/limited/rejected with explicit reasons covering measure family, timing, geographic grain, and health-linkage relevance.

Test plan

• pnpm validate passes
• pnpm reproducibility:check passes (516 tasks)
• All 7 evidence URLs return 200 under the source-checker user agent

Protocol Notes

• Source rot found across the repo. Running pnpm verify:sources surfaced genuinely dead URLs in other packs (HTTP 404): fao-grassland-degradation-2023 (fao.org/publications/grasslands/2023), pollinator-monitoring-gap-tropical (a ScienceDirect article), and wmo-heat-health-2023 (public.wmo.int state-of-climate-services link); plus several *.nic.in and geos-chem.org records that fail to fetch (possibly geo/TLS-restricted). Recommend a scheduled verify:sources CI job so link rot is caught automatically rather than only when a pack is next touched. Tracking as a separate maintenance PR.