docs(kb): notițe active recall recuperate + reindexare

Cele două linkuri Facebook din 31 aug erau video-uri DIFERITE, nu unul singur —
de aceea retry-urile au produs duplicate în loc să acopere ambele.

- adaugă „How to Do ACTIVE RECALL Effectively" (Simple, actually, 9:14) și
  „How to Study & Learn Using Active Recall" (Huberman × Cal Newport, 5:39),
  transcrise corect în engleză, cu TL;DR completat
- șterge 807k-views-15k-reactions.md și 810k-views-15k-reactions.md: ambele erau
  același link, transcrise cu `ro` forțat pe audio englezesc (text halucinat)
- adaugă nota YouTube din 29 aug rămasă necomisă
- reindexare via tools/update_notes_index.py

cron/: bookkeeping de last_run/next_run scris de scheduler.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0188YmDTUAzVvZDVh8JL8xSa

cron/jobs.json

@@ -11,9 +11,9 @@
     "report_on": "changes",
     "timeout": 120,
     "enabled": true,
-    "last_run": "2026-08-27T16:00:00.002423+00:00",
+    "last_run": "2026-08-29T16:00:00.003543+00:00",
     "last_status": "ok",
-    "next_run": "2026-08-28T10:00:00+00:00"
+    "next_run": "2026-09-01T10:00:00+00:00"
   },
   {
     "name": "security-audit-daily",
@@ -43,9 +43,9 @@
     "report_on": "never",
     "timeout": 120,
     "enabled": true,
-    "last_run": "2026-08-27T03:30:00.002353+00:00",
+    "last_run": "2026-08-31T03:30:00.002140+00:00",
     "last_status": "ok",
-    "next_run": "2026-08-28T03:30:00+00:00"
+    "next_run": "2026-09-01T03:30:00+00:00"
   },
   {
     "name": "archive-tasks-daily",
@@ -59,9 +59,9 @@
     "report_on": "changes",
     "timeout": 60,
     "enabled": true,
-    "last_run": "2026-08-27T03:00:00.001621+00:00",
+    "last_run": "2026-08-31T03:00:00.001757+00:00",
     "last_status": "ok",
-    "next_run": "2026-08-28T03:00:00+00:00"
+    "next_run": "2026-09-01T03:00:00+00:00"
   },
   {
     "name": "backup-config",
@@ -75,9 +75,9 @@
     "report_on": "never",
     "timeout": 120,
     "enabled": true,
-    "last_run": "2026-08-27T02:00:00.000911+00:00",
+    "last_run": "2026-08-31T02:00:00.001879+00:00",
     "last_status": "ok",
-    "next_run": "2026-08-28T02:00:00+00:00"
+    "next_run": "2026-09-01T02:00:00+00:00"
   },
   {
     "name": "insights-extract",
@@ -243,9 +243,9 @@
     "prompt": "Heartbeat check. Rulează src/heartbeat.py printr-un scurt raport de status.\nDacă nu e nimic de raportat (email=0, calendar nu are evenimente <2h, kb ok), răspunde doar cu HEARTBEAT_OK și oprește-te — nu trimite mesaj.\nDacă e ceva: raport scurt pe Discord #echo-work.",
     "allowed_tools": [],
     "enabled": true,
-    "last_run": "2026-08-27T14:00:00.002158+00:00",
+    "last_run": "2026-08-31T18:00:00.004045+00:00",
     "last_status": "ok",
-    "next_run": "2026-08-27T18:00:00+00:00"
+    "next_run": "2026-09-01T06:00:00+00:00"
   },
   {
     "name": "night-execute",