fix(todo-continuation-enforcer): add stagnation state fields

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-opencode)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

src/hooks/todo-continuation-enforcer/types.ts

@@ -27,8 +27,10 @@ export interface SessionState {
   isRecovering?: boolean
   countdownStartedAt?: number
   abortDetectedAt?: number
+  lastIncompleteCount?: number
   lastInjectedAt?: number
   inFlight?: boolean
+  stagnationCount: number
   consecutiveFailures: number
 }