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/routers/incidents.py

@@ -20,7 +20,7 @@ router = APIRouter(prefix="/api/incidents", tags=["incidents"])
 
 INCIDENT_UPDATE_COLUMNS = {
     "title", "description", "type", "status", "refresh_mode",
-    "refresh_interval", "retention_days", "international_sources", "visibility",
+    "refresh_interval", "retention_days", "international_sources", "include_telegram", "visibility",
 }
 
 
@@ -105,9 +105,9 @@ async def create_incident(
     now = datetime.now(TIMEZONE).strftime('%Y-%m-%d %H:%M:%S')
     cursor = await db.execute(
         """INSERT INTO incidents (title, description, type, refresh_mode, refresh_interval,
-           retention_days, international_sources, visibility,
+           retention_days, international_sources, include_telegram, visibility,
            tenant_id, created_by, created_at, updated_at)
-           VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)""",
+           VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)""",
         (
             data.title,
             data.description,
@@ -116,6 +116,7 @@ async def create_incident(
             data.refresh_interval,
             data.retention_days,
             1 if data.international_sources else 0,
+            1 if data.include_telegram else 0,
             data.visibility,
             tenant_id,
             current_user["id"],
@@ -721,6 +722,7 @@ def _build_json_export(
             "updated_at": incident.get("updated_at"),
             "summary": incident.get("summary"),
             "international_sources": bool(incident.get("international_sources")),
+            "include_telegram": bool(incident.get("include_telegram")),
         },
         "sources": sources,
         "fact_checks": [

src/routers/sources.py

@@ -87,6 +87,7 @@ async def get_source_stats(
     stats = {
         "rss_feed": {"count": 0, "articles": 0},
         "web_source": {"count": 0, "articles": 0},
+        "telegram_channel": {"count": 0, "articles": 0},
         "excluded": {"count": 0, "articles": 0},
     }
     for row in rows:
@@ -516,6 +517,32 @@ async def delete_source(
     await db.commit()
 
 
+
+
+@router.post("/telegram/validate")
+async def validate_telegram_channel(
+    data: dict,
+    current_user: dict = Depends(get_current_user),
+):
+    """Prueft ob ein Telegram-Kanal erreichbar ist und gibt Kanalinfo zurueck."""
+    channel_id = data.get("channel_id", "").strip()
+    if not channel_id:
+        raise HTTPException(status_code=400, detail="channel_id ist erforderlich")
+
+    try:
+        from feeds.telegram_parser import TelegramParser
+        parser = TelegramParser()
+        result = await parser.validate_channel(channel_id)
+        if result:
+            return result
+        raise HTTPException(status_code=404, detail="Kanal nicht erreichbar oder nicht gefunden")
+    except HTTPException:
+        raise
+    except Exception as e:
+        logger.error("Telegram-Validierung fehlgeschlagen: %s", e, exc_info=True)
+        raise HTTPException(status_code=500, detail="Telegram-Validierung fehlgeschlagen")
+
+
 @router.post("/refresh-counts")
 async def trigger_refresh_counts(
     current_user: dict = Depends(get_current_user),