Support image recognition for url links in Markdown file, fix log error in code_exec (#10139)

### What problem does this PR solve?

Support image recognition with image links in markdown files, solved
issue: #8755
Fixed log info error in code_exec, solved issue: #10064

### Type of change (8755)

- [x] New Feature (non-breaking change which adds functionality)

### Type of change (10064)

- [x] Bug Fix (non-breaking change which fixes an issue)

api/apps/system_app.py

@@ -36,6 +36,8 @@ from rag.utils.storage_factory import STORAGE_IMPL, STORAGE_IMPL_TYPE
 from timeit import default_timer as timer
 
 from rag.utils.redis_conn import REDIS_CONN
+from flask import jsonify
+from api.utils.health import run_health_checks
 
 @manager.route("/version", methods=["GET"])  # noqa: F821
 @login_required
@@ -169,6 +171,12 @@ def status():
     return get_json_result(data=res)
 
 
+@manager.route("/healthz", methods=["GET"])  # noqa: F821
+def healthz():
+    result, all_ok = run_health_checks()
+    return jsonify(result), (200 if all_ok else 500)
+
+
 @manager.route("/new_token", methods=["POST"])  # noqa: F821
 @login_required
 def new_token():