fix health checks on startup

.env.appview.example

@@ -71,6 +71,21 @@ ATCR_UI_ENABLED=true
 # Log formatter: text, json (default: text)
 # ATCR_LOG_FORMATTER=text
 
+# ==============================================================================
+# Hold Health Check Configuration
+# ==============================================================================
+
+# How often to check health of hold endpoints in the background (default: 15m)
+# Queries database for unique hold endpoints and checks if they're reachable
+# Examples: 5m, 15m, 30m, 1h
+# ATCR_HEALTH_CHECK_INTERVAL=15m
+
+# How long to cache health check results (default: 15m)
+# Cached results avoid redundant health checks on page renders
+# Should be >= ATCR_HEALTH_CHECK_INTERVAL for efficiency
+# Examples: 15m, 30m, 1h
+# ATCR_HEALTH_CACHE_TTL=15m
+
 # ==============================================================================
 # Jetstream Configuration (ATProto event streaming)
 # ==============================================================================