Add LiteLLM maintenance scripts and systemd health-check timer

litellm-dedup.sh: removes duplicate model DB entries (idempotent, supports
--dry-run). Root cause of duplicates was litellm-init running multiple times
before the DB was populated, causing all entries to be inserted concurrently.

litellm-health-check.sh: runs every 6 hours via systemd user timer; checks
liveness (auto-restarts container if unresponsive) and duplicate entries
(auto-dedups when DEDUP=1). Logs to litellm-maintenance.log.

Systemd units: litellm-health-check.{service,timer} installed under
~/.config/systemd/user/.

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

litellm-dedup.sh

@@ -0,0 +1,73 @@
+#!/usr/bin/env bash
+# Removes duplicate model entries from the LiteLLM DB.
+# Keeps the first registered entry per model name; deletes the rest.
+# Safe to run at any time — idempotent, no-op when no duplicates exist.
+# Usage: ./litellm-dedup.sh [--dry-run]
+
+set -euo pipefail
+
+LITELLM_URL="${LITELLM_URL:-http://localhost:18804}"
+LITELLM_MASTER_KEY="${LITELLM_MASTER_KEY:-$(grep LITELLM_MASTER_KEY /home/will/lab/swarm/.env | cut -d= -f2)}"
+DRY_RUN=0
+[ "${1:-}" = "--dry-run" ] && DRY_RUN=1
+
+log() { echo "[$(date '+%Y-%m-%d %H:%M:%S')] $*"; }
+
+# Fetch all DB model entries
+RESPONSE=$(curl -sf -H "Authorization: Bearer $LITELLM_MASTER_KEY" \
+  "$LITELLM_URL/v2/model/info") || { log "ERROR: failed to reach LiteLLM at $LITELLM_URL"; exit 1; }
+
+# Find duplicate IDs (keep first occurrence of each name, collect the rest)
+DUPES=$(echo "$RESPONSE" | python3 -c "
+import sys, json
+data = json.loads(sys.stdin.read())
+seen = {}
+dupes = []
+for m in data.get('data', []):
+    info = m.get('model_info', {})
+    if not info.get('db_model'):
+        continue
+    name = m.get('model_name', '')
+    db_id = info.get('id', '')
+    if name not in seen:
+        seen[name] = db_id
+    else:
+        dupes.append(db_id)
+for d in dupes:
+    print(d)
+")
+
+TOTAL=$(echo "$DUPES" | grep -c . 2>/dev/null || true)
+
+if [ "$TOTAL" -eq 0 ]; then
+    log "No duplicates found."
+    exit 0
+fi
+
+log "Found $TOTAL duplicate entries."
+
+if [ "$DRY_RUN" -eq 1 ]; then
+    log "Dry run — would delete:"
+    echo "$DUPES"
+    exit 0
+fi
+
+ok=0; fail=0
+while IFS= read -r id; do
+    [ -z "$id" ] && continue
+    result=$(curl -sf -X POST \
+        -H "Authorization: Bearer $LITELLM_MASTER_KEY" \
+        -H "Content-Type: application/json" \
+        -d "{\"id\": \"$id\"}" \
+        "$LITELLM_URL/model/delete" 2>/dev/null || echo "error")
+    if echo "$result" | grep -q "deleted successfully"; then
+        ok=$((ok + 1))
+    else
+        log "WARN: failed to delete $id: $result"
+        fail=$((fail + 1))
+    fi
+done <<EOF
+$DUPES
+EOF
+
+log "Deleted: $ok  Failed: $fail"