Phase 17: Health-Tab Filter + Org-Spalte + History-View + URL-Schema-Fix

Backend:
- shared/services/source_health.py: URL ohne https://-Prefix wird normalisiert
  bevor httpx.get() aufgerufen wird (Bug-Fix: t.me/kanal liess httpx mit
  ValueError crashen, Synchron mit Monitor-Fix 1ee6c4d).
- routers/sources.py /health: Query erweitert um tenant_id, category,
  language, bias, org_name (LEFT JOIN organizations) - Frontend kann jetzt
  pro Issue Tenant-Info anzeigen.
- routers/sources.py /health/history NEU: letzte N Runs aus
  source_health_history aggregiert (run_id, archived_at, errors/warnings/ok).

Frontend (source-health.js):
- healthFilters State: status / check_type / org.
- applyHealthFilter() reduziert die Anzeige.
- Filter-Bar mit 3 Dropdowns + Counter "X / Y Ergebnisse".
- Tabelle erweitert: Org-Spalte ("global" oder Org-Name), Sprache-Spalte.
- History-View neu: letzte 10 Runs als Tabelle (Zeitpunkt, Run-ID, Counts).

Cache-Buster auf 20260509c gebumpt.

src/routers/sources.py

@@ -578,9 +578,12 @@ async def get_health(
     cursor = await db.execute("""
         SELECT
             h.id, h.source_id, s.name, s.domain, s.url, s.source_type,
+            s.tenant_id, s.category, s.language, s.bias,
+            o.name AS org_name,
             h.check_type, h.status, h.message, h.details, h.checked_at
         FROM source_health_checks h
         JOIN sources s ON s.id = h.source_id
+        LEFT JOIN organizations o ON o.id = s.tenant_id
         ORDER BY
             CASE h.status WHEN 'error' THEN 0 WHEN 'warning' THEN 1 ELSE 2 END,
             s.name
@@ -605,6 +608,40 @@ async def get_health(
     }
 
 
+
+
+
+@router.get("/health/history")
+async def get_health_history(
+    limit: int = 20,
+    admin: dict = Depends(get_current_admin),
+    db: aiosqlite.Connection = Depends(db_dependency),
+):
+    """Liefert die letzten N Health-Check-Runs aus source_health_history.
+
+    Pro Run: run_id, archived_at (Run-Zeitpunkt), Counts pro Status.
+    """
+    cursor = await db.execute("""
+        SELECT name FROM sqlite_master WHERE type='table' AND name='source_health_history'
+    """)
+    if not await cursor.fetchone():
+        return []
+
+    cursor = await db.execute("""
+        SELECT run_id,
+               MIN(archived_at) AS archived_at,
+               COUNT(*) AS total,
+               SUM(CASE WHEN status = 'error'   THEN 1 ELSE 0 END) AS errors,
+               SUM(CASE WHEN status = 'warning' THEN 1 ELSE 0 END) AS warnings,
+               SUM(CASE WHEN status = 'ok'      THEN 1 ELSE 0 END) AS ok
+        FROM source_health_history
+        GROUP BY run_id
+        ORDER BY archived_at DESC
+        LIMIT ?
+    """, (max(1, min(limit, 100)),))
+    return [dict(row) for row in await cursor.fetchall()]
+
+
 @router.get("/suggestions")
 async def get_suggestions(
     admin: dict = Depends(get_current_admin),