feat: add proactive cron tasks and systemd timers\n\n- 10 proactive tasks: ingest with self-healing & link suggestions, daily summary, health check, archive stale, tag normalizer, predictive links, auto assign review, import context buffer\n- systemd timers for scheduling (02:00/14:00 slots, 30min intervals, weekly)\n- all tasks tested and working\n\nRefs: #1

cron_tasks/archive_stale.py

@@ -0,0 +1,56 @@
+#!/usr/bin/env python3
+"""
+Markiert Engramme mit access_count=0, die älter als 7 Tage sind, als 'archived'.
+Reduziert Graph-Clutter und verbessert Performance.
+"""
+
+from __future__ import annotations
+
+import json
+import sqlite3
+import sys
+from datetime import datetime, timezone, timedelta
+from pathlib import Path
+
+BRAIN_DIR = Path("/root/.openclaw/workspace/second-brain")
+DB_PATH = BRAIN_DIR / "data" / "brain.sqlite"
+
+def run():
+    now = datetime.now(timezone.utc)
+    cutoff = now - timedelta(days=7)
+
+    conn = sqlite3.connect(str(DB_PATH))
+    conn.row_factory = sqlite3.Row
+    c = conn.cursor()
+
+    # Engramme finden: access_count=0 UND created_at älter als 7 Tage
+    c.execute("""
+        SELECT id, metadata_json FROM engrams
+        WHERE json_extract(metadata_json, '$.access_count') = 0
+          AND created_at < ?
+    """, (cutoff.isoformat(),))
+    rows = c.fetchall()
+
+    archived = 0
+    for r in rows:
+        meta = json.loads(r["metadata_json"] or "{}")
+        tags = meta.get("tags", [])
+        if "archived" not in tags:
+            tags.append("archived")
+            meta["tags"] = tags
+            c.execute("UPDATE engrams SET metadata_json = ?, modified_at = ? WHERE id = ?",
+                      (json.dumps(meta), now.isoformat(), r["id"]))
+            archived += 1
+
+    conn.commit()
+    conn.close()
+
+    print(json.dumps({
+        "success": True,
+        "time": now.isoformat(),
+        "archived_count": archived,
+        "cutoff_date": cutoff.isoformat(),
+    }, indent=2, ensure_ascii=False))
+
+if __name__ == "__main__":
+    run()