feat(x): X (Twitter) als Bezugsquelle pro Lage

X-Accounts werden analog zu Telegram als Quelle (source_type=x_account)
konfiguriert und pro Lage ueber include_x zugeschaltet. Der Scraper
(feeds/x_parser.py, twscrape) liest Account-Timelines, optional ueber
einen HTTP-Proxy mit Fallback auf direkten Abruf ueber die Server-IP.

- DB-Migration include_x, Pydantic-Modelle, incidents-Router
- Orchestrator-X-Pipeline plus Haiku-Account-Vorselektion
- sources-Router /x/validate, x_account-Typ in Stats und Frontend
- Lage-Einstellungen: X-Toggle neben international und Telegram
- twscrape als Abhaengigkeit

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/routers/incidents.py

@@ -21,7 +21,7 @@ router = APIRouter(prefix="/api/incidents", tags=["incidents"])
 
 INCIDENT_UPDATE_COLUMNS = {
     "title", "description", "type", "status", "refresh_mode",
-    "refresh_interval", "refresh_start_time", "retention_days", "international_sources", "include_telegram", "visibility",
+    "refresh_interval", "refresh_start_time", "retention_days", "international_sources", "include_telegram", "include_x", "visibility",
 }
 
 
@@ -89,7 +89,7 @@ async def list_incidents(
     query = (
         "SELECT id, title, description, type, status, refresh_mode, refresh_interval, "
         "refresh_start_time, retention_days, visibility, "
-        "international_sources, include_telegram, created_by, created_at, updated_at, "
+        "international_sources, include_telegram, include_x, created_by, created_at, updated_at, "
         "CASE WHEN summary IS NOT NULL AND summary != '' THEN 1 ELSE 0 END AS has_summary "
         "FROM incidents WHERE tenant_id = ? AND (visibility = 'public' OR created_by = ?)"
     )
@@ -120,9 +120,9 @@ 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,
-           refresh_start_time, retention_days, international_sources, include_telegram, visibility,
+           refresh_start_time, retention_days, international_sources, include_telegram, include_x, visibility,
            tenant_id, created_by, created_at, updated_at)
-           VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)""",
+           VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)""",
         (
             data.title,
             data.description,
@@ -133,6 +133,7 @@ async def create_incident(
             data.retention_days,
             1 if data.international_sources else 0,
             1 if data.include_telegram else 0,
+            1 if data.include_x else 0,
             data.visibility,
             tenant_id,
             current_user["id"],
@@ -385,7 +386,7 @@ async def update_incident(
     for field, value in data.model_dump(exclude_none=True).items():
         if field not in INCIDENT_UPDATE_COLUMNS:
             continue
-        if field in ("international_sources", "include_telegram"):
+        if field in ("international_sources", "include_telegram", "include_x"):
             updates[field] = 1 if value else 0
         else:
             updates[field] = value