docs(work): close dag-and-readiness-v1 epic

docs/work/dag-and-readiness-v1/01-extended-state/_story.md

@@ -3,7 +3,7 @@ id: 01-extended-state
 epic: dag-and-readiness-v1
 title: Frontmatter array parsing + extended state shape
 type: technical-story
-status: in-progress
+status: done
 feature: scripts
 depends-on: []
 blocks: [02-dag-computation]
@@ -11,7 +11,7 @@ blocks: [02-dag-computation]
 
 ## Tasks
 
-- [ ] Story scaffold
-- [ ] Extend parseFrontmatter to parse array values like `depends-on: [a, b]`
-- [ ] Extend buildState to include depends_on + blocks per story entry
-- [ ] Update existing tests; add new array-parsing tests
+- [x] Story scaffold
+- [x] Extend parseFrontmatter to parse array values like `depends-on: [a, b]`
+- [x] Extend buildState to include depends_on + blocks per story entry
+- [x] Update existing tests; add new array-parsing tests