Slice 4 control-plane repairs, lint/catalog cleanup, Flue adapter fixes

Convex control plane (Slices 1-4 prerequisites for Slice 5):
- Versioned Definition/Design persistence: revisions preserve history
  instead of deleting prior slices/approvals
- Fenced conversation turn queue: attempt-numbered leases prevent stale
  worker overwrites; expired turns reconciled by cron
- Fenced Run/Attempt claiming: only queued attempts from running Runs can
  be claimed; lease expiry checks on every finish/checkpoint
- Multi-slice progression: successful slice marks next slice ready instead
  of completing the whole Work; completed Runs blocked from retry
- Typed AttemptClassification in schema and resolver decisions table
- Durable resolver decisions for normal outcomes, cancellation, and
  lease-expiry recovery
- Persistent artifacts and delivery metadata with provenance, source
  revision, verification status, and controlled delivery transitions
- High-impact open questions block definition approval
- Question submission gated to defining/awaiting-approval states only
- Delivery status updates validate JSON metadata before persisting
- Planner failures recorded as durable blocked events
- Approval identity uses canonical tokenIdentifier

Primitives:
- decodeDefinition separates decode from validate
- Design validation enforces 1-4 slices with unique IDs and valid deps
- Artifact and delivery draft schemas with verified-revision binding
- Delivery status transition table

Package management:
- Consolidated shared deps into single catalog (hono, valibot, streamdown,
  @types/react, @types/node, @tailwindcss/*, react-native)
- Removed cross-version Hono boundary: flue() exported as Fetchable
- Deleted bun.lock and regenerated from clean catalog resolution

Lint/format:
- Removed .eslintignore; oxc uses native ignorePatterns in oxlint.config.ts
- Deleted redundant packages/backend/.oxlintrc.json
- Added repos/** and scripts/** to ignore patterns
- Convex-specific rule overrides for ES2022 target constraints
- Fixed all oxc errors in fluePersistence.ts and agents/src/db.ts
- Fixed all formatting across changed files

packages/ui/package.json

@@ -30,15 +30,15 @@
     "shadcn": "^4.12.0",
     "shiki": "^4.3.1",
     "sonner": "catalog:",
-    "streamdown": "^2.5.0",
+    "streamdown": "catalog:",
     "tailwind-merge": "catalog:",
     "tw-animate-css": "^1.4.0",
     "use-stick-to-bottom": "^1.1.6"
   },
   "devDependencies": {
     "@code/config": "workspace:*",
-    "@tailwindcss/postcss": "^4.3.2",
-    "@types/react": "^19.2.17",
+    "@tailwindcss/postcss": "catalog:",
+    "@types/react": "catalog:",
     "@types/react-dom": "catalog:",
     "tailwindcss": "catalog:",
     "typescript": "catalog:"