chore: update AI platform integration

Update HLL Vietnam AI Platform integration with ai-platform.json, extended task lifecycle folders, config-aware runner, lightweight validation, report ignore rules, and platform documentation updates.

ai/README.md

@@ -6,17 +6,29 @@ Its purpose is operational, not product-facing. It exists to help the project pl
 
 ## Included areas
 
+- `../ai-platform.json`: repository-specific platform configuration for local workers and validation
 - `task-template.md`: standard structure for every task
 - `repo-context.md`: repository and product context for planners and workers
 - `architecture-index.md`: quick map of the repository structure
 - `system-metrics.md`: lightweight log for platform execution metrics
+- `reports/`: generated local platform reports; Markdown reports are ignored except `.gitkeep`
 - `prompts/`: reusable planning prompts
 - `orchestrator/`: role guidance and orchestration documents
 - `tasks/`: task queue split by status
 
+## Task lifecycle
+
+- `tasks/pending/`: scoped tasks ready for a worker
+- `tasks/in-progress/`: tasks currently being executed
+- `tasks/review/`: completed work waiting for human or orchestrator review
+- `tasks/blocked/`: tasks that cannot continue without a decision or missing input
+- `tasks/obsolete/`: tasks intentionally retired without execution
+- `tasks/done/`: validated and completed tasks
+
 ## HLL Vietnam usage rules
 
 - The platform must reflect the real state of HLL Vietnam, not generic sample content.
 - Tasks should be created only when there is a justified change to perform.
 - This integration does not add product features by itself.
 - The current product stack remains HTML, CSS and JavaScript on the frontend, with Python reserved for the future backend.
+- Codex workers must process explicit tasks only and use `ai-platform.json` for local platform paths where scripts support it.