feat(obs): add init_obs_with_config API and signature guard test (#2175)

Signed-off-by: houseme <housemecn@gmail.com>
Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Copilot <198982749+Copilot@users.noreply.github.com>

scripts/inspect_dashboard.sh

@@ -0,0 +1,77 @@
+#!/usr/bin/env bash
+#
+# Copyright 2024 RustFS Team
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+set -euo pipefail
+
+DASHBOARD_PATH=".docker/observability/grafana/dashboards/rustfs.json"
+
+if ! command -v jq >/dev/null 2>&1; then
+  echo "ERROR: jq is required by scripts/inspect_dashboard.sh" >&2
+  exit 1
+fi
+
+if [[ ! -f "$DASHBOARD_PATH" ]]; then
+  echo "ERROR: dashboard file not found: $DASHBOARD_PATH" >&2
+  exit 1
+fi
+
+jq -r '
+  def pystr:
+    if . == null then "None" else tostring end;
+  def pyrepr:
+    if . == null then "None"
+    elif type == "string" then
+      "\u0027"
+      + (gsub("\\\\"; "\\\\\\\\")
+      | gsub("\u0027"; "\\\\\u0027")
+      | gsub("\n"; "\\\\n")
+      | gsub("\r"; "\\\\r")
+      | gsub("\t"; "\\\\t"))
+      + "\u0027"
+    else tostring
+    end;
+
+  "Total panels: \(.panels | length)",
+  "Dashboard version: \(.version)",
+  "",
+  (
+    .panels[]
+    | [
+        (.id // 0),
+        (.type | pystr),
+        (.gridPos.y | pystr),
+        (.gridPos.h | pystr),
+        (.gridPos.w | pystr),
+        (.title | pyrepr)
+      ]
+    | @tsv
+  )
+' "$DASHBOARD_PATH" | {
+  IFS= read -r total_line
+  IFS= read -r version_line
+  IFS= read -r blank_line
+
+  printf '%s\n' "$total_line"
+  printf '%s\n' "$version_line"
+  printf '%s\n' "$blank_line"
+
+  while IFS=$'\t' read -r pid ptype y h w title; do
+    printf "  id=%4d  type=%-12s  y=%-4s  h=%-4s  w=%-4s  title=%s\n" \
+      "$pid" "$ptype" "$y" "$h" "$w" "$title"
+  done
+}
+