Prepare GeoIntel 1.0.0 release candidate

docs/README.md

@@ -1,6 +1,16 @@
 # GeoIntel Docs Index
 
-Start here when preparing an implementation pass.
+Start with these active release controls:
+
+- `00-start/START_HERE.md`
+- `RC_SCOPE_FREEZE_BELGIUM_NORTH_SEA.md`
+- `RC_ROADMAP_BELGIUM_NORTH_SEA.md`
+- `RELEASE_RUNBOOK.md`
+- `DEFINITION_OF_DONE.md`
+
+The milestone and sprint documents below are retained as historical design and
+implementation evidence. `TODO.md` is an implementation archive, not the
+active release board.
 
 ## Product foundation
 - PRODUCT_VISION.md
@@ -37,13 +47,13 @@ Start here when preparing an implementation pass.
 - UI_PAGE_SPECIFICATIONS.md
 - COMPONENT_BREAKDOWN.md
 
-## Execution
+## Historical execution
 - CODEX_MASTER_PROMPT.md
 - CODEX_EXECUTION_PLAN.md
 - CODEX_BUILD_PLAN.md
 - CODEX_EXECUTION_LOG.md
 - ACCEPTANCE_CRITERIA.md
-- TODO.md
+- TODO.md (historical implementation archive)
 - IMPLEMENTATION_BACKLOG.md
 - DEVELOPMENT_RULES.md
 - AGENTS.md