Relax ClickHouse deploy preflight

Author: richiemcilroy

scripts/preflight-control-plane-host.sh

@@ -255,22 +255,22 @@ probe_clickhouse() {
   local password="$4"
   local exists
   url="${url%/}"
-  if curl -fsS --max-time 10 --retry 3 --retry-delay 2 --retry-all-errors -u "$user:$password" \
+  if curl --http1.1 -fsS --max-time 10 --retry 3 --retry-delay 2 --retry-all-errors -u "$user:$password" \
     "$url/?database=$database&query=SELECT%201" >/dev/null; then
     operator_ok "ClickHouse connectivity probe passed"
   else
-    operator_fail "ClickHouse connectivity probe failed"
+    operator_warn "ClickHouse connectivity probe failed after retries; continuing because runtime telemetry can retry"
     return 0
   fi
   exists="$(
-    curl -fsS --max-time 10 -u "$user:$password" \
+    curl --http1.1 -fsS --max-time 10 -u "$user:$password" \
       --retry 3 --retry-delay 2 --retry-all-errors \
       "$url/?database=$database&query=EXISTS%20TABLE%20playback_events" || true
   )"
   if [[ "$exists" == "1" ]]; then
     operator_ok "ClickHouse playback telemetry table probe passed"
   else
-    operator_fail "ClickHouse playback_events table is missing or not queryable"
+    operator_warn "ClickHouse playback_events table probe failed; continuing because runtime telemetry can retry"
   fi
 }