fix(clustering): drop TTL check from isUpToDate; task hash is the only signal

If tasks haven't changed, the output is valid forever. If they changed,
always recompute regardless of age. TTL on focus-area restored to 24h —
it only controls recommender eligibility, not recompute frequency.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

ml/agents/focus_area.py

@@ -37,7 +37,7 @@ MANIFEST = AgentManifest(
     context_schema=["todoist.tasks"],
     required_consents=["data:core", "data:todoist"],
     output_contract={"type": "snippet", "format": "free_text"},
-    ttl_sec=3_600,
+    ttl_sec=86_400,
     inferred_params=[
         InferredParam(
             key="preferred_areas",

services/api/src/routes/agent-outputs.ts

@@ -165,17 +165,14 @@ function taskListHash(tasks: { content?: string }[]): string {
 }
 
 async function isUpToDate(userId: string, agentId: string, currentHash: string): Promise<boolean> {
-  const now = new Date().toISOString();
   const rows = await db
-    .select({ signalsSnapshot: agentOutputs.signalsSnapshot, expiresAt: agentOutputs.expiresAt })
+    .select({ signalsSnapshot: agentOutputs.signalsSnapshot })
     .from(agentOutputs)
     .where(and(eq(agentOutputs.userId, userId), eq(agentOutputs.agentId, agentId)))
     .limit(1);
   if (!rows.length) return false;
-  const row = rows[0];
-  if (row.expiresAt <= now) return false;
   try {
-    const snapshot = JSON.parse(row.signalsSnapshot ?? '{}') as { _task_hash?: string };
+    const snapshot = JSON.parse(rows[0].signalsSnapshot ?? '{}') as { _task_hash?: string };
     return snapshot._task_hash === currentHash;
   } catch { return false; }
 }