v0.1.0-rc1 — first release candidate

First release candidate. Extracted from unicef-drp/DW-Production PR #89.

Highlights

• R helpers feature-complete under r/R/: dw_io, dw_api, cso_toolkit_sync.
• Mode contract enforced in dw_api.R via dw_require_no_api() — reviewers cannot call upstream APIs.
• .provenance.json sidecars on every dw_save() (sha256, schema, user, timestamp, metadata).
• Vendoring model — copy into consumer's 00_functions/, pin via .toolkit_manifest.yml. See docs/toolkit_strategy.md.
• Three-role model documented (docs/roles_and_workflow.md) — PRODUCER / REVIEWER / INGESTOR.
• DBM pre-deposit template (templates/dbm_submission_template.md) — 8-section checklist with the ed pilot as a worked example.

What's not in this RC

• Stata helpers (stata/src/) — scaffolded only; ship in v0.2.
• Python helpers (python/src/) — scaffolded only; ship in v0.2.
• HIV / WASH Stata save calls still write to canonical paths.

Cutting v1.0.0

After the ed sector pilot lands (DW-Production PR #64) and a second sector vendors the helpers without modification.