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/config.py

@@ -76,3 +76,9 @@ MAX_ARTICLES_PER_DOMAIN_RSS = 10  # Max. Artikel pro Domain nach RSS-Fetch
 # Magic Link
 MAGIC_LINK_EXPIRE_MINUTES = 10
 MAGIC_LINK_BASE_URL = os.environ.get("MAGIC_LINK_BASE_URL", "https://monitor.aegis-sight.de")
+
+# Telegram (Telethon)
+TELEGRAM_API_ID = int(os.environ.get("TELEGRAM_API_ID", "2040"))
+TELEGRAM_API_HASH = os.environ.get("TELEGRAM_API_HASH", "b18441a1ff607e10a989891a5462e627")
+TELEGRAM_SESSION_PATH = os.environ.get("TELEGRAM_SESSION_PATH", "/home/claude-dev/.telegram/telegram_session")
+