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/database.py

@@ -259,6 +259,12 @@ async def init_db():
             await db.execute("ALTER TABLE incidents ADD COLUMN visibility TEXT DEFAULT 'public'")
             await db.commit()
 
+        if "include_telegram" not in columns:
+            await db.execute("ALTER TABLE incidents ADD COLUMN include_telegram INTEGER DEFAULT 0")
+            await db.commit()
+            logger.info("Migration: include_telegram zu incidents hinzugefuegt")
+
+
         if "tenant_id" not in columns:
             await db.execute("ALTER TABLE incidents ADD COLUMN tenant_id INTEGER REFERENCES organizations(id)")
             await db.commit()