Implement Vault secret cache system

New scripts:
- vault-cache.sh: Main cache manager (sync/get/list/status/invalidate)
- vault-env.sh: Sourceable environment with quick accessor functions
- vault-api-cached.sh: Drop-in replacement for vault_api.sh using cache
- nocodb-api.sh: NocoDB API wrapper using cached token
- qdrant-api.sh: Qdrant API wrapper using cached key
- README-vault-cache.md: Documentation

Updated scripts:
- vault_grist_api.sh: Now uses vault cache
- checks/check-memory-table.sh: Uses vault cache
- utils/get-columns.sh: Uses vault cache
- utils/update-type-col.sh: Uses vault cache

Features:
- 29 secrets cached from Vault (6 categories)
- Auto-refresh on stale entries (1hr TTL)
- Vault token cached for 24h
- Restricted permissions (700/600) on cache files
- Fallback to direct Vault API if cache miss

scripts/qdrant-api.sh

@@ -0,0 +1,44 @@
+#!/bin/bash
+# qdrant-api.sh - Qdrant API wrapper using vault cache
+# Usage: source this file or call its functions
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+source "${SCRIPT_DIR}/vault-env.sh"
+
+QDRANT_URL=$(vault_qdrant_url)
+QDRANT_API_KEY=$(vault_qdrant_api_key)
+
+if [ -z "$QDRANT_API_KEY" ]; then
+    echo "Error: Could not retrieve Qdrant API key from vault cache"
+    return 1 2>/dev/null || exit 1
+fi
+
+# Make Qdrant API calls
+qdrant_api() {
+    local method="${1:-GET}"
+    local endpoint="$2"
+    local payload="${3:-}"
+    
+    local headers=(-H "api-key: ${QDRANT_API_KEY}" -H "Content-Type: application/json")
+    
+    if [ "$method" = "GET" ]; then
+        curl -sk "${headers[@]}" "${QDRANT_URL}${endpoint}"
+    else
+        curl -sk -X "$method" "${headers[@]}" -d "$payload" "${QDRANT_URL}${endpoint}"
+    fi
+}
+
+# Common operations
+qdrant_list_collections() {
+    qdrant_api GET "/collections"
+}
+
+qdrant_collection_info() {
+    local collection="${1:-}"
+    [ -z "$collection" ] && { echo "Usage: qdrant_collection_info <collection_name>"; return 1; }
+    qdrant_api GET "/collections/${collection}"
+}
+
+# Export
+export -f qdrant_api qdrant_list_collections qdrant_collection_info
+export QDRANT_URL QDRANT_API_KEY