feat: harden intelligence runtime and llm providers

lib/alerts/telegram.mjs

@@ -41,6 +41,8 @@ export class TelegramAlerter {
     this._commandHandlers = {};  // Registered command callbacks
     this._pollingInterval = null;
     this._botUsername = null;
+    this._pollFailureCount = 0;
+    this._lastPollErrorLogAt = 0;
   }
 
   get isConfigured() {
@@ -353,6 +355,7 @@ export class TelegramAlerter {
 
       const data = await res.json();
       if (!data.ok || !Array.isArray(data.result)) return;
+      this._pollFailureCount = 0;
 
       for (const update of data.result) {
         this._lastUpdateId = Math.max(this._lastUpdateId, update.update_id);
@@ -366,9 +369,14 @@ export class TelegramAlerter {
         await this._handleMessage(msg);
       }
     } catch (err) {
-      // Silent — polling failures are non-fatal
+      this._pollFailureCount++;
       if (!err.message?.includes('aborted')) {
-        console.error('[Telegram] Poll error:', err.message);
+        const now = Date.now();
+        const quietMs = Math.min(300000, 30000 * this._pollFailureCount);
+        if (now - this._lastPollErrorLogAt > quietMs) {
+          this._lastPollErrorLogAt = now;
+          console.error(`[Telegram] Poll degraded (${this._pollFailureCount} consecutive failures):`, err.message);
+        }
       }
     }
   }