Adotta schema single-field env[] per Tavily: chiave API come voce env, auth semplificato, no requires

- Tavily: applicato manifest esatto con env[0] tavilyApiKey (secret:true),
  auth: {type:api_key}, no requires, URL referenzia {SECRET:tavilyApiKey}
- Email: auth semplificato (type:password, no delivery), rimosso ENV da requires
- connectors.json: aggiunto auth compatto per Tavily ed Email, rimossi requires
  API_KEY/ENV, fixati duplicati icon_lg.svg/verify.py residui

connectors/tavily/connector.json

@@ -7,43 +7,29 @@
     "url": "https://mcp.tavily.com/mcp/?tavilyApiKey={SECRET:tavilyApiKey}",
     "transport": "streamable-http"
   },
-  "requires": [
-    "API_KEY",
-    "ENV"
-  ],
-  "env": [
-    {
-      "name": "tavilyApiKey",
-      "label": "Tavily API key",
-      "description": "Your Tavily API key (find it at https://app.tavily.com). Used both as the MCP URL query parameter and for the verification request.",
-      "required": true,
-      "secret": true,
-      "example": "tvly-xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
-    }
-  ],
   "verify": {
     "command": "python3 verify.py",
     "timeout_secs": 15
   },
-  "docs": [
-    {
-      "lang": "en",
-      "description": "Tavily MCP: web search and content extraction server. Use for real-time search, news articles, and site scraping. Returns fresh, relevant results from the web.",
-      "llm_short_description": "Web search MCP \u2014 real-time results, news, site scraping. Richiede API key Tavily."
-    }
-  ],
+  "docs": [{
+    "lang": "en",
+    "description": "Ricerca web e page-extraction in tempo reale, via Tavily.",
+    "llm_short_description": "Cerca sul web ed estrai contenuti delle pagine tramite Tavily."
+  }],
+  "auth": {
+    "type": "api_key"
+  },
+  "env": [{
+    "name": "tavilyApiKey",
+    "label": "Tavily API key",
+    "description": "Creala su https://app.tavily.com (dashboard del tuo account).",
+    "required": true,
+    "secret": true,
+    "example": "tvly-xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
+  }],
   "homepage": "https://tavily.com",
   "icon_small": "icon_sm.png",
   "icon_large": "icon_lg.png",
   "scope": "global",
-  "tags": [
-    "search",
-    "mcp",
-    "remote"
-  ],
-  "auth": {
-    "type": "api_key",
-    "delivery": "query",
-    "param": "tavilyApiKey"
-  }
-}
+  "tags": ["search", "mcp", "remote"]
+}