fix: HealthResponse no longer contains non-existent services field

/health returns only { status, uptime }. The HealthServices subtype
(redis/db status) was never returned by the API. Removed both the
field and the HealthServices class.

Verified against live endpoint:
    curl https://v2-api.scrapegraphai.com/api/health
    -> {"status": "ok", "uptime": 17936}

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: FrancescoSaverioZuppichini

src/scrapegraph_py/schemas.py

@@ -471,14 +471,8 @@ class CreditsResponse(ResponseModel):
     model_config = ConfigDict(extra="allow")
 
 
-class HealthServices(ResponseModel):
-    redis: Literal["ok", "down"]
-    db: Literal["ok", "down"]
-
-
 class HealthResponse(ResponseModel):
     status: str
     uptime: int
-    services: HealthServices | None = None
 
     model_config = ConfigDict(extra="allow")