refactor(api): migrate MCP listing from DeepNLP to PulseMCP service

- Updated imports to use PulseMCPSearchParams and PulseMCPService instead of DeepNLP equivalents
- Replaced DeepNLP API calls with PulseMCP API endpoints and parameters
- Modified cached MCP transformation to manual mapping for PulseMCP data format
- Enhanced error handling and retry logic in server tools retrieval
- Added PulseMCP API base URL constant for centralized configuration

This change switches the underlying MCP provider from DeepNLP to PulseMCP, ensuring compatibility with the new API while maintaining existing functionality for MCP listing and tool retrieval.

lib/types/mcp.ts

@@ -18,10 +18,6 @@ export interface MCPProvider {
   tags: string[]; // mapeado de content_tag_list
   rating: number; // já existe na API
   totalRatings: number; // mapeado de review_cnt
-  downloads: number; // opcional, calcular baseado em reviews
-  iconUrl?: string; // mapeado de thumbnail_picture
-  screenshotUrls?: string[];
-  capabilities: string[]; // mapeado de ext_info.tools
   repository?: string; // mapeado de website
   homepage?: string;
   installed: boolean; // verificar localmente
@@ -81,14 +77,48 @@ export interface MCPServerConfig {
 export interface MCPSearchParams {
   category?: string;
   search?: string;
-  sort?:
-    | "rating"
-    | "downloads"
-    | "name"
-    | "recent"
-    | "total_ratings"
-    | "updated_at";
+  sort?: "rating" | "name" | "recent" | "total_ratings" | "updated_at";
   order?: "asc" | "desc";
   limit?: number;
   offset?: number;
 }
+
+// PulseMCP API Types
+export interface PulseMCPSearchParams {
+  query?: string;
+  integrations?: string[];
+  count_per_page?: number;
+  offset?: number;
+}
+
+export interface PulseMCPResponse {
+  servers: MCPServerMetadata[];
+  next?: string;
+  total_count: number;
+}
+
+export interface MCPServerMetadata {
+  name: string;
+  url: string;
+  external_url?: string;
+  short_description: string;
+  source_code_url: string;
+  github_stars?: number;
+  package_registry: "npm" | "pypi" | "cargo";
+  package_name: string;
+  package_download_count?: number;
+  EXPERIMENTAL_ai_generated_description?: string;
+  _meta: {
+    "com.pulsemcp": {
+      estimated_downloads_all_time: number;
+      estimated_downloads_last_30_days: number;
+      estimated_downloads_last_7_days: number;
+      standardized_name: string;
+      standardized_description: string;
+      standardized_provider_name: string;
+      standardized_provider_url: string;
+      estimated_released_on: string;
+      is_official: boolean;
+    };
+  };
+}