calcom: fix healthcheck path (/api/health 404 in v4.x -> /api/auth/providers)

/api/health doesn't exist in cal.com v4.x (404) -> container stayed unhealthy ->
Traefik wouldn't route it. /api/auth/providers is a stable 200 once serving.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

templates/calcom/.felhom.yml

@@ -78,7 +78,8 @@ healthcheck:
   checks:
     - type: api
       port: 3000
-      path: "/api/health"
+      # /api/health does not exist in cal.com v4.x (404); /api/auth/providers is a stable 200 once serving.
+      path: "/api/auth/providers"
       expect:
         status: 200
 

templates/calcom/docker-compose.yml

@@ -41,7 +41,7 @@ services:
         limits:
           memory: 768M
     healthcheck:
-      test: ["CMD", "wget", "--spider", "-q", "http://localhost:3000/api/health"]
+      test: ["CMD", "wget", "--spider", "-q", "http://localhost:3000/api/auth/providers"]
       interval: 30s
       timeout: 5s
       retries: 3