1570 Address PR review: null-safe Ollama response format and quieter empty-connection log

- OllamaChatAction: guard against a missing responseFormat when a response map
  is present, avoiding a NullPointerException.
- ListConnectionsForComponentToolCallback: log a component with no connection
  definition at DEBUG instead of WARN; it is an expected case already tracked by
  the "empty" state metric.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: ivicac

server/ee/libs/ai/ai-copilot/ai-copilot-tool/src/main/java/com/bytechef/ee/ai/copilot/tool/ListConnectionsForComponentToolCallback.java

@@ -148,7 +148,7 @@ public String call(String toolInput, @Nullable ToolContext toolContext) {
             } catch (NoSuchElementException exception) {
                 metrics.recordStateVisibility(TOOL_NAME, "empty");
 
-                log.warn(
+                log.debug(
                     "Component {} v{} exposes no connection definition; treating as no connections available.",
                     componentName, componentVersion);
 

server/libs/modules/components/ai/llm/ollama/src/main/java/com/bytechef/component/ai/llm/ollama/action/OllamaChatAction.java

@@ -204,7 +204,7 @@ public class OllamaChatAction {
             if (response != null) {
                 Object responseFormat = response.get(RESPONSE_FORMAT);
 
-                if (!responseFormat.equals(ChatModel.ResponseFormat.TEXT.name())) {
+                if (responseFormat != null && !responseFormat.equals(ChatModel.ResponseFormat.TEXT.name())) {
                     ollamaChatOptionsBuilder.outputSchema((String) response.get(RESPONSE_SCHEMA));
                 }
             }