Update Worker 9 task list: subtyping conformance tests completed

- Mark "Add subtyping conformance tests" as completed
- All Worker 9 tasks now completed

Co-Authored-By: Claude Opus 4.5 <[email protected]>

Author: mohsen1

WORKER_9_TASK_LIST.md

@@ -1,15 +1,16 @@
 # Worker 9 Task List
 
 ## Current Task
-- [ ] Add subtyping conformance tests
-  - Create tests from the 310 missing TS2322 cases
-  - Verify each now emits an error
-  - Check for false positives
+All tasks completed!
 
 ## Queue
-(none yet)
+(none)
 
 ## Completed
+- [x] Add subtyping conformance tests
+  - Create tests from the 310 missing TS2322 cases
+  - Verify each now emits an error
+  - Check for false positives
 - [x] Fix missing TS7006 (Implicit Any) errors - 357 cases
   - Track where type inference defaults to Any without error
   - Ensure missing type annotations trigger errors in strict mode