Telegram-Kanaele als Quelle: Parser, Pipeline, UI-Checkbox, Validate-Endpoint

- Neuer source_type telegram_channel in models.py (Source + Incident)
- DB-Migration: include_telegram Spalte fuer incidents
- feeds/telegram_parser.py: Telethon-basierter Parser (analog RSS)
- Orchestrator: Telegram-Pipeline parallel zu RSS + WebSearch
- sources.py: POST /api/sources/telegram/validate Endpoint
- incidents.py: include_telegram in Create/Update/Response
- dashboard.html: Telegram-Checkbox + Filter-Option
- app.js: FormData, EditModal, SourceStats, TypeLabels
- config.py: TELEGRAM_API_ID, API_HASH, SESSION_PATH
- requirements.txt: telethon hinzugefuegt

src/agents/orchestrator.py

@@ -535,6 +535,7 @@ class AgentOrchestrator:
             description = incident["description"] or ""
             incident_type = incident["type"] or "adhoc"
             international = bool(incident["international_sources"]) if "international_sources" in incident.keys() else True
+            include_telegram = bool(incident["include_telegram"]) if "include_telegram" in incident.keys() else False
             visibility = incident["visibility"] if "visibility" in incident.keys() else "public"
             created_by = incident["created_by"] if "created_by" in incident.keys() else None
             tenant_id = incident["tenant_id"] if "tenant_id" in incident.keys() else None
@@ -620,11 +621,24 @@ class AgentOrchestrator:
                 logger.info(f"Claude-Recherche: {len(results)} Ergebnisse")
                 return results, usage
 
-            # Beide Pipelines parallel starten
-            (rss_articles, rss_feed_usage), (search_results, search_usage) = await asyncio.gather(
-                _rss_pipeline(),
-                _web_search_pipeline(),
-            )
+            async def _telegram_pipeline():
+                """Telegram-Kanal-Suche."""
+                from feeds.telegram_parser import TelegramParser
+                tg_parser = TelegramParser()
+                articles = await tg_parser.search_channels(title, tenant_id=tenant_id, keywords=None)
+                logger.info(f"Telegram-Pipeline: {len(articles)} Nachrichten")
+                return articles, None
+
+            # Pipelines parallel starten (RSS + WebSearch + optional Telegram)
+            pipelines = [_rss_pipeline(), _web_search_pipeline()]
+            if include_telegram:
+                pipelines.append(_telegram_pipeline())
+
+            pipeline_results = await asyncio.gather(*pipelines)
+
+            (rss_articles, rss_feed_usage) = pipeline_results[0]
+            (search_results, search_usage) = pipeline_results[1]
+            telegram_articles = pipeline_results[2][0] if include_telegram else []
 
             if rss_feed_usage:
                 usage_acc.add(rss_feed_usage)
@@ -635,7 +649,7 @@ class AgentOrchestrator:
             self._check_cancelled(incident_id)
 
             # Alle Ergebnisse zusammenführen
-            all_results = rss_articles + search_results
+            all_results = rss_articles + search_results + telegram_articles
 
             # Duplikate entfernen (normalisierte URL + Headline-Ähnlichkeit)
             seen_urls = set()