fix(aiops): route backup decisions through ssh

apps/api/src/services/callback_dispatcher.py

@@ -35,6 +35,18 @@ import yaml
 logger = structlog.get_logger(__name__)
 
 
+_PROVIDER_ALIASES = {
+    "k8s": "kubernetes",
+    "ssh": "ssh_host",
+}
+
+
+def _resolve_provider_name(provider_name: str) -> str:
+    """Normalize legacy callback spec provider names to registered MCP providers."""
+
+    return _PROVIDER_ALIASES.get(provider_name, provider_name)
+
+
 # =============================================================================
 # Data Types
 # =============================================================================
@@ -262,14 +274,15 @@ async def dispatch_action(
 
         # MCP registry dispatch
         from src.plugins.mcp.registry import get_provider
-        provider = get_provider(spec.mcp_provider)
+        provider_name = _resolve_provider_name(spec.mcp_provider)
+        provider = get_provider(provider_name)
         if not provider:
             duration = (time.perf_counter() - start) * 1000
             return DispatchResult(
                 success=False, action=action_name, incident_id=incident_id,
                 user_id=user_id,
-                result_text=f"{spec.emoji} {spec.label} 失敗：MCP provider '{spec.mcp_provider}' 未註冊",
-                error=f"provider_not_found: {spec.mcp_provider}",
+                result_text=f"{spec.emoji} {spec.label} 失敗：MCP provider '{provider_name}' 未註冊",
+                error=f"provider_not_found: {provider_name}",
                 duration_ms=duration,
             )