Fix: add wavespeed to requirements, make SDK import optional

requirements.txt

@@ -15,3 +15,4 @@ python-multipart>=0.0.6
 python-dotenv>=1.0.0
 runpod>=1.6.0
 paramiko>=3.4.0
+wavespeed

src/content_engine/services/cloud_providers/wavespeed_provider.py

@@ -27,7 +27,13 @@ import uuid
 from typing import Any
 
 import httpx
-from wavespeed import Client as WaveSpeedClient
+
+try:
+    from wavespeed import Client as WaveSpeedClient
+    _SDK_AVAILABLE = True
+except ImportError:
+    WaveSpeedClient = None
+    _SDK_AVAILABLE = False
 
 from content_engine.services.cloud_providers.base import CloudGenerationResult, CloudProvider
 
@@ -166,7 +172,7 @@ class WaveSpeedProvider(CloudProvider):
 
     def __init__(self, api_key: str):
         self._api_key = api_key
-        self._client = WaveSpeedClient(api_key=api_key)
+        self._client = WaveSpeedClient(api_key=api_key) if _SDK_AVAILABLE else None
         self._http_client = httpx.AsyncClient(timeout=300)
 
     @property