May 19, 2026: Full harness update

- Model migration: gemma-4-E4B → qwen3.5-9b-vlm
- Dashboard reorder: Usage Over Time + GPU Metrics to top
- Router counter leak fix (gpu_decr in except handler)
- VLM slot upgrade 1→2
- Automated maintenance cron job
- LiteLLM config update

maintenance.sh

@@ -0,0 +1,37 @@
+#!/bin/bash
+# SyslogAI Harness — Automated Maintenance
+# Runs daily via cron
+
+LOG="/var/log/harness-maintenance.log"
+echo "=== $(date) ===" >> "$LOG"
+
+# 1. Clean Redis timeseries keys older than 60 days
+CUTOFF=$(date -d "60 days ago" +%Y%m%d%H)
+echo "Redis: removing ts:* keys older than $CUTOFF" >> "$LOG"
+DELETED=0
+for key in $(docker exec harness-redis redis-cli KEYS "ts:*" 2>/dev/null); do
+    TS=$(echo "$key" | grep -oP '\d{10}$')
+    if [ -n "$TS" ] && [ "$TS" -lt "$CUTOFF" ] 2>/dev/null; then
+        docker exec harness-redis redis-cli DEL "$key" > /dev/null 2>&1
+        DELETED=$((DELETED + 1))
+    fi
+done
+echo "Redis: deleted $DELETED stale timeseries keys" >> "$LOG"
+
+# 2. Log stale model keys (leftover from migrations)
+STALE=$(docker exec harness-redis redis-cli KEYS "*gemma*" 2>/dev/null)
+if [ -n "$STALE" ]; then
+    echo "WARNING: stale gemma keys found: $STALE" >> "$LOG"
+fi
+
+# 3. Prune Docker build cache (older than 7 days)
+echo "Docker: pruning build cache" >> "$LOG"
+docker builder prune -f --filter until=168h >> "$LOG" 2>&1
+
+# 4. Log container health status
+docker ps --format "table {{.Names}}\t{{.Status}}\t{{.RunningFor}}" >> "$LOG" 2>&1
+
+# 5. Log Redis memory
+docker exec harness-redis redis-cli INFO memory | grep used_memory_human >> "$LOG" 2>&1
+
+echo "" >> "$LOG"