Täglicher Quellen-Health-Check + Haiku-Vorschläge

- Neue Tabellen: source_health_checks, source_suggestions
- source_health.py: Prüft Erreichbarkeit, Feed-Validität, Aktualität, Duplikate
- source_suggester.py: KI-gestützte Vorschläge via Claude Haiku
- APScheduler Job: Automatischer Check täglich um 04:00

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/database.py

@@ -184,6 +184,30 @@ CREATE TABLE IF NOT EXISTS article_locations (
 CREATE INDEX IF NOT EXISTS idx_article_locations_incident ON article_locations(incident_id);
 CREATE INDEX IF NOT EXISTS idx_article_locations_article ON article_locations(article_id);
 
+
+CREATE TABLE IF NOT EXISTS source_health_checks (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    source_id INTEGER NOT NULL REFERENCES sources(id) ON DELETE CASCADE,
+    check_type TEXT NOT NULL,
+    status TEXT NOT NULL,
+    message TEXT,
+    details TEXT,
+    checked_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+);
+CREATE INDEX IF NOT EXISTS idx_source_health_source ON source_health_checks(source_id);
+
+CREATE TABLE IF NOT EXISTS source_suggestions (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    suggestion_type TEXT NOT NULL,
+    title TEXT NOT NULL,
+    description TEXT,
+    source_id INTEGER REFERENCES sources(id) ON DELETE SET NULL,
+    suggested_data TEXT,
+    priority TEXT DEFAULT 'medium',
+    status TEXT DEFAULT 'pending',
+    reviewed_at TIMESTAMP,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+);
 CREATE TABLE IF NOT EXISTS user_excluded_domains (
     id INTEGER PRIMARY KEY AUTOINCREMENT,
     user_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,