fix(gateway): add lazy_deps.ensure() to slack, matrix, dingtalk, feishu adapters (#25014)

Only Discord and Telegram had lazy-install hooks in their
check_*_requirements() functions. The remaining four platforms that were
moved to lazy_deps (Slack, Matrix, DingTalk, Feishu) would just return
False immediately if their packages weren't pre-installed — no attempt
to install them at runtime.

This means even with the .venv permissions fix (#24841), these four
platforms would still fail to load in Docker (or any fresh install)
unless the user manually ran pip install.

Add the same lazy_deps.ensure() pattern to all four, matching the
existing Discord/Telegram implementation.

gateway/platforms/dingtalk.py

@@ -111,9 +111,33 @@ DINGTALK_TYPE_MAPPING = {
 
 
 def check_dingtalk_requirements() -> bool:
-    """Check if DingTalk dependencies are available and configured."""
+    """Check if DingTalk dependencies are available and configured.
+
+    Lazy-installs dingtalk-stream via ``tools.lazy_deps.ensure("platform.dingtalk")``
+    on first call if not present.
+    """
+    global DINGTALK_STREAM_AVAILABLE, dingtalk_stream, ChatbotMessage, CallbackMessage, AckMessage
+    global HTTPX_AVAILABLE, httpx
     if not DINGTALK_STREAM_AVAILABLE or not HTTPX_AVAILABLE:
-        return False
+        try:
+            from tools.lazy_deps import ensure as _lazy_ensure
+            _lazy_ensure("platform.dingtalk", prompt=False)
+        except Exception:
+            return False
+        try:
+            import dingtalk_stream as _ds
+            from dingtalk_stream import ChatbotMessage as _CM
+            from dingtalk_stream.frames import CallbackMessage as _CBM, AckMessage as _AM
+            import httpx as _httpx
+        except ImportError:
+            return False
+        dingtalk_stream = _ds
+        ChatbotMessage = _CM
+        CallbackMessage = _CBM
+        AckMessage = _AM
+        httpx = _httpx
+        DINGTALK_STREAM_AVAILABLE = True
+        HTTPX_AVAILABLE = True
     if not os.getenv("DINGTALK_CLIENT_ID") or not os.getenv("DINGTALK_CLIENT_SECRET"):
         return False
     return True