Add full JSON dump to get_container_status diagnostic logging

Replaces key-only log with complete json.dumps output (up to 2000 chars)
so the actual DSM response structure is visible in Claude Desktop logs.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/mcp_synology_container/modules/containers.py

@@ -2,6 +2,7 @@
 
 from __future__ import annotations
 
+import json
 import logging
 import re
 import sys
@@ -128,7 +129,8 @@ def register_containers(mcp: FastMCP, config: AppConfig, client: DsmClient) -> N
             return f"Error getting container '{container_name}': {e}"
 
         sys.stderr.write(
-            f"[get_container_status] name={clean_name!r} data_keys={list(data.keys())}\n"
+            f"[get_container_status] name={clean_name!r} "
+            f"raw response: {json.dumps(data, indent=2, default=str)[:2000]}\n"
         )
         sys.stderr.flush()
 
@@ -338,12 +340,7 @@ def _format_container_detail(name: str, data: dict[str, Any]) -> str:
     status/image fields as returned by the list endpoint).
     """
     # Unwrap "container" wrapper if present (common DSM API pattern)
-    if "container" in data and isinstance(data["container"], dict):
-        sys.stderr.write("[get_container_status] unwrapping 'container' key\n")
-        sys.stderr.flush()
-        raw = data["container"]
-    else:
-        raw = data
+    raw = data["container"] if "container" in data and isinstance(data["container"], dict) else data
 
     # Docker Engine inspect format: State / Config / HostConfig
     state = raw.get("State", {}) or {}
@@ -355,11 +352,6 @@ def _format_container_detail(name: str, data: dict[str, Any]) -> str:
     running = state.get("Running") if "Running" in state else (status_str == "running")
     image_str = config.get("Image") or raw.get("image") or "?"
 
-    sys.stderr.write(
-        f"[get_container_status] status={status_str!r} running={running!r} image={image_str!r}\n"
-    )
-    sys.stderr.flush()
-
     lines = [
         f"Container: {name}",
         f"  Status:    {status_str}",